My name is Deepak Castelino too.I am based in Mumbai.I used to see your name in The World This Week long time back when I was small and my friends used to tell me when did u learn music and I was really enjoying the false fame .I do not know or heard any other Deepak Castelino other than you.Nice to hear about you....As far as the last name is consdired I think it is Italian but not sure what it means.