Another F.A. here (Edward MATUSJAK, b. 22.03.1920):
https://collections.arolsen-archives.org/en/document/6591692
I note that all identified cards in this thread at this point relate to prisoners who arrived in the camp on the same day - January 23, 1943.
edit: another thread including „F.A.“ document, also with arrival date on 23/01/1943:
edit2:
Witor Mortschinowski (Martschinowski/Mortschinowskij).
Also F.A., also arrived on 23/01/1943…