I can t see any problems using the term Half Jewish Garry Kasparov uses it regularly refering to his own ethnicity See for example the transcript for a radio interview made by ABC News Australia April 3 2005 Interviewer Monica Attard comments about his non Russian roots Attard Well you were born in Azerbaijan as I understand it Kasparov Yes I am born in Baku and I am half Armenian half Jewish but my native tongue is Russian my culture is Russian my education is Russian