There are a lot already mentioned, so I will have some repeats. Some of the obvious ones from many of these songs are:
[name_f]Mary[/name_f], [name_m]Shepherd[/name_m], [name_f]Glory[/name_f] or [name_f]Gloria[/name_f], [name_m]Emmanuel[/name_m], and [name_f]Joy[/name_f]. I’ve listed a few from some of the songs below.
Angels We Have Heard on High - [name_u]Angel[/name_u], [name_f]Angela[/name_f], [name_f]Angelica[/name_f]; [name_f]Meadow[/name_f] (I know it says plains, but I’m taking liberty); [name_f]Sharon[/name_f] (refers to the plains around [name_m]Israel[/name_m]); [name_m]Shepherd[/name_m]
Go Tell It on the Mountain- There are lots of names that mean “mountain”, e.g., [name_u]Montana[/name_u], [name_m]Montague[/name_m], [name_m]Montgomery[/name_m], [name_m]Goran[/name_m] (often used in former Yugoslavia, it means “Mountain main”), Beaumont (means beautiful mountain)
Hark! The Herald Angels [name_m]Sing[/name_m] - my absolute favorite (mine too!) - Herald/[name_m]Harold[/name_m], [name_f]Mercy[/name_f], [name_m]Emmanuel[/name_m], [name_f]Virginia[/name_f]
It Came Upon the [name_m]Midnight[/name_m] Clear - [name_f]Claire[/name_f] (means clear), [name_f]Layla[/name_f] (means “night”), [name_f]Nisha[/name_f] (also means “night”)
[name_f]Joy[/name_f] to the World - [name_f]Joy[/name_f] (duh), [name_f]Grace[/name_f], other names meaning joy, such as [name_f]Letitia[/name_f], [name_f]Kalea[/name_f] (a Hawaiian name), and [name_f]Rowena[/name_f]
O come, O come, [name_m]Emmanuel[/name_m] - variations of [name_m]Emmanuel[/name_m], such as [name_m]Immanuel[/name_m], [name_m]Manuel[/name_m], [name_f]Emmanuelle[/name_f], [name_f]Manuela[/name_f]
What Child Is This? - [name_f]Victory[/name_f] or [name_f]Victoria[/name_f], [name_m]Ransom[/name_m] (kind of weird, but also kind of cool)
[name_u]Winter[/name_u] Wonderland - [name_u]Winter[/name_u], [name_f]Snow[/name_f], [name_m]Jack[/name_m] (you know, because he’s nipping at your nose)
The [name_u]Christmas[/name_u] Song - [name_f]Merry[/name_f], Chestnut (wouldn’t recommend that one!)
God Rest You [name_f]Merry[/name_f], Gentlemen - [name_u]Comfort[/name_u]
Have Yourself a [name_f]Merry[/name_f] [name_m]Little[/name_m] [name_u]Christmas[/name_u] - [name_f]Goldie[/name_f] or [name_f]Golda[/name_f]
It’s Beginning to Look a Lot Like [name_u]Christmas[/name_u] - [name_u]Silver[/name_u], [name_f]Holly[/name_f], [name_f]Janice[/name_f], [name_f]Jen[/name_f], [name_m]Barney[/name_m], [name_m]Ben[/name_m]
[name_f]Mary[/name_f], Did You Know? - this song gives me chills, I love it 2nd fave song - [name_f]Mary[/name_f]
[name_f]Carol[/name_f] of the Bells - [name_f]Belle[/name_f] or [name_f]Bella[/name_f], [name_u]Dale[/name_u], [name_u]Silver[/name_u]
Rockin’ Around the [name_u]Christmas[/name_u] Tree - [name_f]Holly[/name_f]
Silent [name_m]Night[/name_m] - Again you could use names meaning “night” such as [name_f]Layla[/name_f] or [name_f]Nisha[/name_f]; [name_m]Franz[/name_m] [name_m]Xaver[/name_m] Gruber composed the song, so [name_m]Franz[/name_m] or [name_m]Xaver[/name_m] would work
O Holy [name_m]Night[/name_m] - [name_f]Star[/name_f] or star-related names like [name_f]Estella[/name_f] or [name_f]Stella[/name_f]; [name_f]Hope[/name_f], [name_f]Faith[/name_f]