Cherokee Name Tattoo Union?

I'm in love with a Cherokee man and am ready to get my first tattoo at 45 to show him he's with me for life. His nickname in "Johnny Crush," mine is "Rose". What I've put together for words is, "Tsa Ni Ga ta we du na" and "Tsi s". Is there a way to say "the union of"? Is this correct? And, what would be the best form of "and" or "together"? Thank you!!!