Print Bibliography with Biblatex: Remove Initials and Conjunction “and” Between Authors

I use biblatex+biber with some custom orderings. In particular, I desire a very abbreviated bibliography style for my current document as it's very page limited---a grant proposal, basically. I have been able to set up the fields that I want and in the order that I want. But I don't know how to do two things.

1. Remove initials: Instead of Anonymous Person being displayed as A. Person, I would like it to be simply Person.
2. Remove the and conjunction. I'd like Smith and Thomas to be Smith, Thomas.

I am using giveninits=true as an optional argument which causes Anonymous to be reduced to A.. I'm guessing that some adjustment to this is required to solve 1.. An extremely hacky \renewcommand{\mkbibnamegiven}[1]{} removes the initials, however it does replace them with a single whitespace. I guess I can probably remove one piece of whitespace with further hacking. This doesn't seem like the correct way to solve 2., though.

I have looked on SE and through our friend the biblatex documentation, but to no avail. It seems like something like

\renewbibmacro{author}{%
\usebibmacro{name:family}
}


should work. But it doesn't not. I get "Error: Bibliography macro '\isdot' undefined" and no names are printed.

I include as minimal a MWE as I dare---I don't want to risk removing more custom commands which may be having an effect.

\documentclass[]{article}

\usepackage[doi=false,isbn=false,url=false,
hyperref=auto,
sorting=nyt,
maxnames=10,
maxcitenames=4,
backend=biber,
texencoding=auto,
giveninits=true,
block=space,
style = numeric,
%   style = alphabetic,
%   style = authoryear-comp,
%   citestyle = authoryear-comp
]{biblatex}

\DeclareNameAlias{sortname}{labelname}
\DeclareDelimFormat{finalnamedelim}{\addcomma\space}    % works on biblatex 3.7
%\DeclareDelimAlias{finalnamedelim}{multinamedelim}     % doesn't work on 3.7

\DeclareFieldFormat
[article,inbook,incollection,inproceedings,patent,thesis,unpublished]
{title}{{#1\isdot}}

\DeclareFieldFormat
[article,book,inbook,incollection,inproceedings,patent,thesis,unpublished, online]
{date}{\mkbibparens{#1}}
\DeclareFieldFormat
[article,book,inbook,incollection,inproceedings,patent,thesis,unpublished]
{volume}{\mkbibbold{#1}}
\DeclareFieldFormat
%   [article,book,inbook,incollection,inproceedings,patent,thesis,unpublished]
{pages}{\mkbibparens{#1}}

\DeclareBibliographyDriver{article}{%
\usebibmacro{bibindex}%
\usebibmacro{begentry}%
\usebibmacro{author}%
\usebibmacro{date}%
\newunit\newblock
\usebibmacro{title}%
\usebibmacro{finentry}%
}

\usepackage{filecontents}
\begin{filecontents}{foo.bib}
@article{paper,
author  = {Me, Andrew and Myself, Bethany and I, Charlie},
title   = {BREAKTHROUGH MATHS},
year    = {2025}
}
\end{filecontents}

\begin{document}

Citation: \cite{paper}

\printbibliography

\end{document}


To remove the initials (for standard styles):

\DeclareNameAlias{sortname}{labelname}


To remove "and" between authors:

\DeclareDelimFormat{finalnamedelim}{\addcomma\space}


A better solution, thanks to @moewe (see comments below):

\DeclareDelimAlias{finalnamedelim}{multinamedelim}


Here is a minimal working example:

\documentclass{article}
\usepackage[style=authoryear]{biblatex}

\DeclareNameAlias{sortname}{labelname}
\DeclareDelimAlias{finalnamedelim}{multinamedelim}%thanks to @moewe

\begin{document}
\nocite{*}
\printbibliography[title=Collections,type=collection]
\printbibliography[title=Books,type=book]
\printbibliography[title=Articles,type=article]
\printbibliography[title=Articles,type=article]
\printbibliography[title=Incollections,type=incollection]
\end{document}

• Ivan, you've sorted me out again! Thanks :) – Sam OT Jan 13 at 16:17
• Instead of \DeclareDelimFormat{finalnamedelim}{\addcomma\space} I'd prefer \DeclareDelimAlias{finalnamedelim}{multinamedelim}, because that makes for a more consistent look if I later want to change multinamedelim. – moewe Jan 13 at 16:45
• \DeclareNameAlias{sortname}{labelname} will add given name initials or full given names if family names alone are not unique and thus ambiguous, which I consider a good idea, but that might not be desired. In that case disabling the uniquename feature or defining a real name format that only prints the family name would be the way to go. – moewe Jan 13 at 16:47
• @moewe Can I modify the answer taking into account your comment about finalnamedelim? it's definitely a better solution than mine. – Ivan Jan 13 at 17:17
• You certainly can, Ivan. Just drop a note at the end of your proof to acknowledge improvement due to moewe. – Sam OT Jan 13 at 17:47