No, a suffix is a letter or a group of letters added to the end of a word to change its meaning or create a new word. A middle initial is a single letter representing a person's middle name.
The middle initial "F" in President Ramon F. Magsaysay stands for "Fuentes," which was his mother's maiden name.
His middle initial was "T"
Taylor's middle name is Alison, so her middle initial is A.
Kate Gosselin's middle initial is "I" for Irene.
The middle initial of Sergio Osmena is "S."
The middle initial of Deogracias Rosario is "R."
The middle initial on a boarding pass typically includes the initial of the passenger's middle name.
His middle name is Thomas, so his middle initial is T.
Jessica is Danielle's middle name. Therefore her middle initial is J.
His middle initial stands for Bird!
P. is his middle initial