[Elsie]

St. Paul called people "father".

Sure he did.

[St_Thomas_Aquinas]

St. Paul called people "father".

Sure he did.

FWIW...

1 Cor. 4:14–15

"I do not write this to make you ashamed, but to admonish you as my beloved children. For though you have countless guides in Christ, you do not have many fathers. For I became your father in Christ Jesus through the gospel"

Call No Man Father?

[annalex]

Hebrews 3:9, 1 John 2:13 (well, the latter is obviously not St. Paul, which is in itself a corroboration).