What was the actors name that played Tina sister?

Please provide more context! Which Tina are you referring to?

For example, do you mean:

* Tina Belcher from the animated show "Bob's Burgers"? Her sister is Louise, voiced by Kristen Schaal.

* Tina Turner, the singer? She has a sister named Alline Bullock.

* Tina Fey, the actress and comedian? She has a sister named Penelope Fey.

Once you tell me which Tina you mean, I can answer your question!