Ok, I took a quick look through 1995 and here are some other homophonic ‘a’ vs ‘ar’ examples:
Shana & Sharna
Shani & Sharni
Alana & Alarna (and Alahna for good measure)
We also leave off the terminal /r/, so you get
Tayla / Taylah for
Taylor, Tyla / Tylah for
Tyler, etc.
https://nanowrimo.org/participants/christine-seaforth-finch
http://christineseaforthfinch.blogspot.com/