In Holland there are two versions:1) Jeffrey (Djeffrey) 2) Geoffrey (Djoffrey)But in Holland, France and even India the name is pronounced as 'Djoffrey' and not 'Djeffrey' (Jeffrey). This is because of the 'o' in the name.For example: the name 'George', is pronounced as 'Djorge' and not as 'Djerge'. So, it's very strange you pronounce Geoffrey and Jeffrey as the same name.But if you want to keep it really simple: just 'Geo' will also do. It is short, simple and manly at the same time.