What is the meaning of Sayyid ul Kawnayn? Is it muslim name? Will i keep it for my baby boy?

Sayyid ul Kawnayn is an Arabic word that means "master of the two universes", which is a nickname that some people use for Prophet Muhammad ﷺ. We do not recommend using this name because the meaning is too specific, and using it for a child gives it a clearly false meaning since you cannot say that your child is the master of the two universes.

Sayyud ul Kawnayn may also be seen spelled as Sayyed e Kawnayn, Sayyed-e-Kawnayn, Sayyed al-Kawnayn.