Thomas
From the Aramaic nickname meaning twin. It was first given by Jesus to an Apostle named Judas to distinguish him from Judas Iscariot.

Tamara
Tamara is the Russian form of the biblical name Tamar, which means date palm.
Tamara was the name of a famous Russian queen, and remains a popular name in Russia. A pet form is Tammy.

Tara
Tara is the name of the hill where the ancient High Kings of Ireland held court and which plays an important part in Irish legend.
It has been used as a first name only since the end of the last century.