Beautiful Names

Sometimes you hear people say, "What a beautiful name!" when they hear the name of a baby or are otherwise told about a name. 

Question is, what do they mean? What makes a name beautiful?

I can think of two factors.  One is the significance of the name; it's not the name per se but what it signifies, maybe the person being named for.

Second is more mundane, that the syllables are pleasing to the ear.  Names with a ches sound are not mellifluous.  Names with a lamed are.  And if there is more than one name, it's how pleasingly the names sound together, if they "work" well together or just seem stuck together randomly (in which case usually only one of the names will be used on a regular basis).

Other reasons?