No. It is not a preposition. Fellows is a plural noun.
Don Fellows's birth name is Donald Fellows.
Edith Fellows's birth name is Edith Marilyn Fellows.
Erik Fellows's birth name is Erik John Fellows.
Bryan Fellows is 6'.
Anne Fellows Johnston's birth name is Annie Julia Fellows.
my fellows were in senior cambridge class 1988
Bill Fellows is 5' 10".
Dominic Fellows is 5' 10".
Edith Fellows is 4' 10".
Judith Fellows is 5' 3".
This One's for the Fellows was created in 2004.
Splendid Fellows was created in 1934.