I - for, to, me, I
i - for , to ( preposition ) me , I ( pronoun )
I is a preposition meaning for or to . It also functions as a pronoun meaning me or I.
I can denote possession e.g.
Mae'r bobl hyn yn ffrindiau iddyn nhw. - These people are friends of theirs / their friends.
( literally: 'friends to them' )
First Person - i mi, imi, i fi
Second Person - i ti, i chi
Third Person Masculine - iddo fe/fo
Third Person Feminine - iddi hi
First Person - i ni, inni
Second Person - i chi
Third Person - iddyn nhw