According to Ancestry.com:
The surname Christmas originated in Wales, sometimes given to people born on Christmas Day.There are 89 people named Mary Christmas in the U.S. [no mention Wales or elsewhere on this one].
Other Christmas-related names on U.S. Public Records include: Jack Frost, Santa Claus, Santa Helper, Carol Christmas, On Christmas and Christmas House.
Other names found in the U.S. Public Records include: Xmas Alley, Past Xmas, Eve Xmas, Kris Kringle, Snow Ball, Snow Flakes, Saint Nicholas, Rudolph Reindeer and Ginger Bread [I think I knew a stripper named Snowball].
There is no Frosty the Snowman, but 1,700 individuals show up with the surname Snowman in the census records [1700 Snowmen and not a Frosty among them? …wimps].
Christmas is also a popular first name, according to census records. These include Christmas Joy, Christmas Day, Christmas Week, Christmas Coal, Christmas Cane, Merry Christmas Kellogg and Christmas December.
That’s it for Christmas – Happy Seasonal Tides and Greetings!