Origin of the name Tara: Transferred use of an Irish place-name belonging to a hill in central Ireland, which was an ancient seat of kingship. Tara (hill) was used by Margaret Mitchell for the name of a plantation in her epic Gone With the Wind, resulting in the use of it as a female given name.
Kahan as a name for boys means "battle". Kahan is an alternate form of Kane (Irish, Gaelic): anglicized respelling of Cathán. RELATED TO Ka-, -han, battle (war)