Capitalize only first letter in \citet with biblatex and natbib=true

Question

I have question concerning the use of the \citet command when loading biblatex with the option natbib=true. I'm a LaTeX beginner and this may be an easy question, but i still couldn't solve it.

I'm writing my thesis in LaTeX and i would like to create in-text citation call-outs with the command \citet. The problem is that in the output the letters of the author all get capitalized. I just want to capitalize the first letter of every author.

Is there an option to solve this problem?

\RequirePackage{hyphsubst}
\HyphSubstLet{ngerman}{ngerman-x-latest}

\documentclass[final, english, ngerman, a4paper, 12pt, numbers=noenddot, 
cd=true,
cdfont=false,cdfont=nohead,cdfont=nodin,
cdmath=false,
cdhead=false,
cdfoot=true,
cdcover=monochrome,
cdgeometry=asymmetric,
declaration=heading,
declaration=notoc,
abstract=heading,
]{tudscrreprt}

\usepackage[utf8]{inputenc}
\usepackage{settings/tudbwlimPackages}
\usepackage{settings/tudbwlimStyle}


\usepackage{caption}
\usepackage{scrhack}
\usepackage{algpseudocode}
\usepackage{amsmath}
\usepackage{float}
\usepackage[T1]{fontenc}
\usepackage{longtable}
\usepackage{pbox}
\usepackage{tabularx}
\usepackage{textcomp}
\usepackage{pdflscape}
\usepackage{enumitem}
\usepackage{etoolbox}
\usepackage{multirow}
\usepackage[table,xcdraw]{xcolor}
\usepackage{float}
\floatstyle{plaintop}
\restylefloat{table}
\usepackage{color}
\usepackage{mathrsfs}
\usepackage{svg}

\usepackage{settings/BiblatexSetup}
\AfterPackage*{biblatex}%
{
    \RequirePackage[breaklinks=true, colorlinks=false, linktoc=section, linkcolor=blue, citecolor=black, hidelinks]{hyperref}
    % Da hyperref allerhand Veränderungen an vielen Standardbefehlen vornimmt, sollte dieses als letztes in der Präambel eingebunden werden. Nur Pakete, bei denen in der Dokumentation explizit darauf hingewiesen wird, dass diese nach hyperref zu laden sind, sollten auch danach folgen.
    \hypersetup{pdfprintscaling=None} % gleiches Verhalten, auch ohne hyperref, liefert: \pdfcatalog{/ViewerPreferences<</PrintScaling/None>>}
    \usepackage{footnote} % https://tex.stackexchange.com/questions/207192/footcite-in-float-caption
    \makesavenoteenv{figure}
    \makesavenoteenv{table}
    \makesavenoteenv{algorithm}
}
\AfterPackage*{hyperref}
{
    \RequirePackage[automake,acronym,symbols,nomain,translate=babel,]{glossaries}
    \usepackage{settings/GlossariesSetup}
}


\begin{document}

\end{document}

---

This is the contents of the .sty file

\ExecuteBibliographyOptions{ibidtracker=constrict,dashed=false,bibwarn=true,sortlocale=auto,arxiv=false,isbn=true,url=false,doi=false,eprint=false,%
    maxcitenames=2,maxbibnames=100,uniquename=false,uniquelist=false,giveninits=true,date=year,ibidtracker=false,%
    % authortitle-dw options
    %namefont=smallcaps,firstnamefont=smallcaps,nopublisher=false,idembib=false,edbyidem=false,addyear=true,journalnumber=afteryear,series=afteryear,safeinputenc=true
}

\setlength{\bibitemsep}{\baselineskip}

\AtEveryBibitem{\clearfield{issn}}

%\DeclareDelimFormat{footcitenametitledelim}{\addcolon\space}
\renewcommand*{\labelnamepunct}{\addcolon\space} %\DeclareDelimFormat{nametitledelim}{\addcolon\space}
\renewcommand*{\multinamedelim}{\thinspace\&\thinspace}
\renewcommand*{\finalnamedelim}{\thinspace\&\thinspace}
\renewcommand*{\mkbibnamefamily}[1]{\textsc{#1}}
%\renewcommand*{\mkbibnamegiven}[1]{\textsc{#1}}
\renewcommand{\nameyeardelim}{\addspace}

% authortitle-dw options
%\renewcommand*{\bibmultinamedelim}{\space\slash\space}
%\renewcommand*{\bibfinalnamedelim}{\space\slash\space}
%\renewcommand*{\bibrevsdnamedelim}{}
%\renewcommand*{\jourvolstring}{\space Vol.\space}

\setcounter{biburllcpenalty}{9000}
\setcounter{biburlucpenalty}{9000}

\DeclareFieldFormat*{title}{#1\isdot} %[article,book,inbook,incollection,inproceedings,misc,patent,report,thesis,unpublished]
\DeclareFieldFormat*{citetitle}{\mkbibemph{#1}} % [article,book,inbook,incollection,inproceedings,misc,patent,techreport,thesis,unpublished]
\DeclareFieldFormat[article]{journaltitle}{\mkbibemph{#1},}
\DeclareFieldFormat[article]{volume}{\bibstring{jourvol}\addnbspace #1}
\DeclareFieldFormat[article]{number}{\bibstring{number}\addnbspace #1}
% authortitle-dw options
%%%\DeclareFieldFormat[article]{journaltitle}{\mkbibemph{#1},}
%%%\DeclareFieldFormat[inbook,incollection,inproceedings]{booktitle}{\mkbibemph{#1}}
%%%\DeclareFieldFormat[masterthesis,misc,article,inproceedings,techreport,phdthesis,mastersthesis,thesis,report,inbook,incollection]{title}{#1.}
%%%\AtEveryBibitem{\clearlist{language}}

\DeclareNameAlias{sortname}{last-first}


%%\DeclareDelimFormat[cbx@textcite]{nameyeardelim}{\addspace}
%%\DeclareDelimFormat[cbx@textcite]{nonameyeardelim}{\addspace}



\newbibmacro*{customfootcite}
{\global\boolfalse{cbx:loccit}%
    \iffieldundef{shorthand}%
    {\ifthenelse{\ifciteibid\AND\NOT\iffirstonpage}
        {\usebibmacro{cite:ibid}}
        {\ifthenelse{\ifnameundef{labelname}\OR\iffieldundef{labelyear}}
            {\usebibmacro{cite:label}%
                \setunit{\addspace}}
            {\printnames{labelname}%
                \setunit{\nameyeardelim}}%
            \iffieldundef{labelyear}
            {}
            {\iffieldundef{shorttitle}%
                {\printtext[parens]{\usebibmacro{cite:labeldate+extradate}}\addcolon\addspace\printtext{\printfield[emph]{title}}}%
                {\printtext[parens]{\usebibmacro{cite:labeldate+extradate}}\addcolon\addspace\printtext{\printfield[emph]{shorttitle}}}%
    }}}%
    {\usebibmacro{cite:shorthand}}%
}

\DeclareCiteCommand{\footcite}[\mkbibfootnote]
{\usebibmacro{prenote}}
{\usebibmacro{citeindex}%
    \usebibmacro{customfootcite}
}
{\multicitedelim}
{\usebibmacro{postnote}}



% https://tex.stackexchange.com/questions/97376/missing-vol-and-no-in-biblatex-biber
\renewbibmacro*{volume+number+eid}{%
    \printfield{volume}%
    \setunit{\addcomma\space}%<---- was \setunit*{\adddot}%
    \printfield{number}%
    \setunit{\addcomma\space}%
    \printfield{eid}}

\renewbibmacro*{journal+issuetitle}{%
    \usebibmacro{journal}%
    \setunit*{\addcomma\space}% was: \setunit*{\addspace}
    \iffieldundef{series}
    {}
    {\newunit
        \printfield{series}%
        \setunit{\addcomma\space}}% was: \setunit{\addspace}
    \usebibmacro{volume+number+eid}%
    \setunit{\addspace}%
    \usebibmacro{issue+date}%
    \setunit{\addcolon\space}%
    \usebibmacro{issue}%
    \newunit}


\DefineBibliographyStrings{english}{
    andothers = {{et\,al\adddot}}, bibliography = {Bibliography}, mathesis = {master's thesis}, phdthesis = {doctoral thesis}, techreport = {technical report}, resreport = {research report}, edition = {edition}, volume = {volume}
}

\DefineBibliographyStrings{ngerman}{
    andothers = {{et\,al\adddot}}, bibliography = {Literaturverzeichnis}, mathesis = {Diplomarbeit}, phdthesis = {Dissertation}, techreport = {Technischer Bericht}, resreport = {Forschungsbericht}, edition = {Auflage}, volume = {Band}, jourvol = {Vol.},
}

\DefineBibliographyStrings{german}{
    andothers = {{et\,al\adddot}}, bibliography = {Literaturverzeichnis}, mathesis = {Diplomarbeit}, phdthesis = {Dissertation}, techreport = {Technischer Bericht}, resreport = {Forschungsbericht}, edition = {Auflage}, volume = {Band}, jourvol = {Vol.},
}

---

The bib entry

@Article{Behnamian2015,
  author    = {J. Behnamian},
  title     = {Graph colouring-based algorithm to parallel jobs scheduling on parallel factories},
  journal   = {International Journal of Computer Integrated Manufacturing},
  year      = {2015},
  volume    = {29},
  number    = {6},
  pages     = {622--635},
  month     = {oct},
  doi       = {10.1080/0951192x.2015.1099074},
  publisher = {Informa {UK} Limited},
}

I hope this one is better. Thank you in advance.

Answer 1

You are loading a private package \usepackage{settings/BiblatexSetup} which is changing the way biblatex is working. This line from that package:

\renewcommand*{\mkbibnamefamily}[1]{\textsc{#1}}

is what is what is causing names to show up in small caps (\textsc). Do you know why you're loading this package? Is it required by your university? If so, then perhaps the small caps names are a requirement. If you don't know why you're loading the package, you may not want to load it at all. If you only need to change this one thing, and everything else that the package does meets your specifications, you can add the following line to your preamble after loading the package:

\renewcommand*{\mkbibnamefamily}[1]{#1}