ANSWER:

It is not from the Sunnah and a person should only have one name and not a compound name for one person and other compound names for his father and so on! 

Is putting Syed and Muhammad before my name from the sunnah/is it a sin. Syed is to show that i am a descendant from the Prophets SAW family (is this showing off?) and my family says putting Muhammad (or Ahmed, Yasin, etc.) in your name is sunnah as it is one of the names of Prophet Muhammad SAW, is this correct to say