1) The Prophet Yaqoob (Jacob in English) was also called Israel which means "Servant of Allah". 2) The name of the country formed after world war two that is on occupied Palestinian land.In the Quran the quote 'the Children of Israel' is read often but few people know that it means 'Descendants of Prophet Yaqoob'.
It is also rarely used as a name because Allah often mentions the descendants of Israel as sinners in the Quran, and the current political climate in the middle east makes it innapropriate since someone called Israel would be presumed to be a supporter of the illegal state.