How do you say nana in Welsh?

There isn't a direct translation for "nana" in Welsh, as it's more of a nickname. However, here are some options depending on the context:

For a grandmother:

* Mam-gu: This is the most common and literal translation for "grandmother."

* Nain: This is a more informal term, closer to "grandma."

* Henni: This is a very affectionate term for "grandmother," similar to "Granny."

For a grandfather:

* Tad-cu: This is the most common and literal translation for "grandfather."

* Taid: This is a more informal term, closer to "grandpa."

* Heni: This is a very affectionate term for "grandfather," similar to "Grandpa."

Other options:

* Mam-ma: This means "mother" and could be used as a term of endearment for a grandmother.

* Tad-da: This means "father" and could be used as a term of endearment for a grandfather.

It's important to note that the best option will depend on the specific context and the relationship between the speaker and the person they are referring to.