vierailija
Ok, that confirmed that nickname is "made in Kärtsä"Yeah exactly. To me, "Bojke" doesn't sound like something a Slovenian would invent (of course it's *possible*, anything is possible with B ) but the ending -e is usually for not for male gender. So Bojan, Bojči, Bojč, Boki... but I've never heard of "Bojke"... I could imagine "Bojko", but Bojke...
If you look up "Bojan" in Slovenian Wikipedia, it says the variants for the name Bojan are: Bojc, Bojče, Bojči, Bojeslav, Bojimir, Bojin, Bojkan, Bojko, Bojmir.
Most of these sound archaic to me.
And then Cojke... never heard of it