i dont really have any proof
other than the name
BUT i thought about something:
Susie is bad at grammar and some spelling, right?
what if her real name is Suzy, but she didnt know, cause she didnt know how to spell it?
(i dont know if this has been said before)
Or her real name is Susie since she mispells alot of words in the Gerson letter, and she just mispelled her name when telling the clam thianskwkmasmekwkskdmmssmamamlalakakslskskamsmdkdkskkspapkddnempfjrnallfnkdksbfkdjwbskgojrbs
(again)
then why does alphys and noelle and lancer and like 19 other guys call her susie and not suzy
thatd be like ralsei being actually called ralsay
alternative theory : clam girl is the one mispronouncing/mispelling
wowo reaelly
Because Susie tastes better than Suzy
Because burghley taste better than berdly
fried monster "dough"