"Form of Trinity"
The name Triniti is commonly a female name from the "English" origin.
Triniti is a respelling of Trinity, an English word name taken from Latin trinitas, meaning threefoldness or a set of three. The spelling replaces the ending -ity with -iti while leaving the pronunciation unchanged, and it carries no separate meaning of its own. Recorded use of the name in the United States begins in the 1970s.
Trinity means "Three".
The pronunciation of Triniti is TRIN-ih-tee.