Who Comes Down Your Chimney – Santa or Santy?

I have been fascinated by the word Santy – a variant of Santa, as in Santa Claus – since first I heard it, some years ago, uttered by
the most recognizable child actress of all time, in one of her films. Why Santy and not Santa? I wondered. Encountering Santy again, in other vintage movies, but still not in real life, I imagined the word to be a colloquialism fallen out of favor in these homogenized times in America. (Since forming this conclusion, I have happened upon, in song and verse, the rather rustic-sounding "chocolate [substitute flavor of your choice] sody" for "chocolate soda," which seems confirmation.)

Whence Santy and does anyone in this day exercise this pronunciation option? This from "The History of Santa Claus" at NorthPoleSantaClaus.com:

In the 1600's, the Dutch presented Sinterklaas (meaning St. Nicholas) to the colonies. In their excitement, many English-speaking children uttered the name so quickly that Sinterklaas sounded like Santy Claus. After years of mispronunciation, the name evolved into Santa Claus.

According to Wikipedia, Santy Claus is one of a few designations used by the Irish for the jolly, bearded one.

I kind of like the air of informality in "Santy," with its
t softer in emphasis than that in "Santa." I find myself keeping track, in my movie-viewing, of who says "Santy" and who says "Santa":

Clark Gable says "Santa" in It Happened One Night
Ginger Rogers says "Santy" in I'll Be Seeing You
Kay Francis says "Santy" in In Name Only (this floored me, by the way)
Shirley Temple and James Dunn say "Santy" and Jane Withers (playing Shirley's inappropriately named nemesis, Joy) says "Santa" in Bright Eyes
Betty Grable and Robert Cummings trade choruses on Robin and Rainger's jauntily romantic "You Started Something" – Betty singing "I believe in Santa Claus" and Bob singing "I believe in Santy Claus" – in Moon Over Miami

In popular music, (the ill-fated) Joe Harris baritones "Santy Claus came in the spring" in Benny Goodman's version and Cliff Weston tenors "Santa Claus came in the spring" in Tommy Dorsey's version of the winning Johnny Mercer concoction.

A New Deal-era Santy
(Some viewers may find certain images, reflecting racial stereotypes, offensive)

For whom are you leaving out milk and cookies tonight?