The name Tina is a girl's name of English, Greek origin. Tina and is often added to lists like International Variations of Christina and discussed in our forums with posts like "Girls Makeover - Two Middles".
From the experts:
Tina, despite its petite and tinkly image, is apt these days to be replaced by the more elegant originals, Christina and Martina.It does have some strong namesakes, though, in Tina Turner (born Anna Mae), Tina Brown (born Christina), Tina Fey (born Elizabeth), and photographer Tina Barney (born Tina).
Tina was a Top 100 name from 1956 to 1982, peaking at Number 18 in 1968.