In the words of Deep Thought, "you're not going to like it".

I'm not a Gaelic scholar, just a user, so here's my suggestion for what it's worth, off the top of my head - sort of. I don't know how elegant or poetic it might be:

Chan ann dàimh ga cheangal do shliochd fìor ach meas agus aoibhneas ri deò agaibh do chàch a chèile.

It's not word-for-word, but as close as I could get. I think the tattooist will have a fit, or you might run out of skin.