I need a good nickname

So I'm sitting here thinking about my soon-to-be nephew (or neice) and I decided that I need a really good (special) name that the baby and I can share. In our family the aunts are called tsitse, I looked for this translation on babel fish and the only thing I came up with was...basically nothing. Aunt in Italian is Zia, in Spanish and Portuguese is Tia and in French is tante. I really don't like any of those plus many young children have problems with their Ts. I could always go for Auntie Mame or Mimi, but those name remind me of...well Bea Arthur. So I'm asking for help. Help me find a good nickname that the baby can call me. Something that fits when he is one or 21.