::I understand if people find this dubious, because it's new for them to hear about it. But for us, Copts, we sing all year long in the ancient Egyptian language, saying af-mas-f, which means he was born. I will quote the following from the reference I posted earlier  
 :::The origin of the word Christmas: 
 :::"According to the recent researches, it is proved that the word "Christmas" is of an ancient Egyptian origin. Where this word is consisting of two parts: Christ & mas; Christ is the Lord, but what is mas? Mas is an ancient Egyptian word means: to be born or Birth. The word is drawn in the Hieroglyphic language -the ancient Egyptian language-as follows: The name of the ancient Egyptian king "Thothmas" means: the Birth of Thoth -god of wisdom. Therefore, mas means Birth. Hence, "Christmas" means the Birth of -Our Lord Jesus-Christ." 
 ::Personally, I believe this means something. If people who speak Egyptian agree that "mas" means "to be born", then the claim that the word Christmas is of Egyptian origin can have some credibility. It certainly sounds much more feasable than the current explanation that refers to "Christ's mass." 
 ::So the point is: I am by no means claiming that this is a fact. But if it sounds reasonable and some people believe in it, why not to refer to it as a possibility? 
 ::Thanks in advance, and looking forward to more fruitful discussions with you.