Is the male counterpart of a witch called a wizard or a warlock?

A male witch is called a warlock. A wizard and sorcerer are different and all-though the three may overlap at times there are distinctions.

https://en.wikipedia.org/wiki/Warlock

There are both male and female witches.

https://en.wikipedia.org/wiki/Witchcraft

I'll add to the above with:

Are there male witches? Are they called warlocks?

Yes, there are male witches, and no, they are not called warlocks. "Warlock" is an archaic derogatory term used by the witch hunters during "The Burning Times"—the era of persecution and execution on a massive scale of people who were accused and convicted of witchcraft—to describe male witches. Warlock actually means "oathbreaker." A male witch is properly referred to as a witch.

http://www.electricwitch.com/chapter1.html