This is the 1063rd most frequent Turkish word.
gökhan
The Turkish name "Gökhan" means "ruler of the sky" or "sky khan."
Here, 'Gökhan' is used as a proper noun, a personal name.
Gökhan, dün akşam arkadaşlarıyla birlikte sinemaya gitti.
Gökhan went to the cinema with his friends last night.
In this context, 'Gökhan' is in the dative case (Gökhan+a) to indicate direction or target of the action.
Gökhana bir mesaj göndermek istiyorum.
I want to send Gökhan a message.
Here, 'Gökhan' is in the possessive form (Gökhan'ın), indicating ownership of the idea.