Are Gunter and Tinka real names?

Gunter is an Anglicized form of the Germanic 'Gunther', meaning 'warrior.'

Tinka is not found in behindthename.com, but babynamesgarden.com says it is an English form of the name Celeste, which is the French form of a Roman name meaning 'heavenly.' Another source says it is a shortened form of 'Satinka', a Native American Word meaning 'Sacred Dancer.'