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I have found some family MIs on a website. They were transcribed as part of school project so I cannot vouch for their accuracy. I've managed the dates and relationships bit but am struggling with the verses. The first one is for a girl who died aged 3 and I think is comparing her to a rose soon fading:-

Megis rhosyn hardd blowodd, megis rhosyn buan gwywodd, ond daw bore gwynfydedig ail flodwas anllygredig.

This one is on my gggrandparents' grave:-
Gwynebau hoff go llaum ennyd awr a wenant aenom eto gyda'r nefol nawr.

Any help would be much appreciated.