It’s worth noting that English place names record a large number of Anglo-Saxon male names ending in A, many following the same VCCV pattern or a CVCCV version. Some examples from a quick search:
Offa
HorsaDaecca
Reada
Haesta
Banna
Dida
Totta
Waca
Tota
Billa
Cippa
Seen in this context, although we may not have a clear etymology for it,
Anna looks completely unremarkable as a male name.
https://nanowrimo.org/participants/christine-seaforth-finch
http://christineseaforthfinch.blogspot.com/
This message was edited 5/1/2021, 12:30 AM