This page lists Ktarians.
“Greskrendtregk was a male Ktarian and a member of Starfleet who held the rank of ensign in 2371...Greskrendtregk
“Etana Jol was a Ktarian female who worked for her people as a military operative. She had the...Etana Jol
“Doctor Mizan was a Ktarian. According to Geordi La Forge, he was "notorious," but also an expert...Mizan