Is there a practice of honor killings among non-Muslims anywhere? I do not know, just wondering.
The large number of Honor killings among Hindu's in India is generally a Caste crime in certain areas of the country. Mainly happens when a women is dating or elopes and marries a man who belongs to a different caste than her family. It's a common occurrence but generally not reported to the authorities.
Italy up until the last couple of decades, was well known for its honor killings
Central America and Brazil still have honor killings.
In the country of Brazil if a man killed his wife and then fled the scene. The police had 24 hours to apprehend him. If he evaded capture for 24 hours, he was a free man, and no charges could be brought against him. Supposedly, this law has been changed, but very few men have been prosecuted.
Parts of Asia still have honor killings.
The Balkan countries (former Yugoslavia) in southern Europe still have honor killings, although the authorities generally turn a blind eye. ...