Oxford English Dictionnary confirms 'tittle' although any sign, such as the Spanish tilde (same origin) or the French accents or German Umlauts, part of a letter can be considered a tittle. The dot is therefore a tittle, although a tittle is not necessarily that dot.
May 10 2000, 11:44 AM
zbeckabee
Answer has 7 votes
zbeckabee Moderator 19 year member
11752 replies
Answer has 7 votes.
A tittle is a small distinguishing mark, such as a diacritic or the dot on a lowercase i or j.
https://en.wikipedia.org/wiki/Tittle