John:

Your hypothesis, while apparently consistent, is not based on any etymological connection I can think of. As far as I know the etymology of the word "condom" is unknown...

"condom
1706, traditionally named for a British physician during reign of Charles II, but there is no evidence for that. Also spelled condam, quondam, which suggests it may be from It. guantone, from guanto "a glove." A word not used openly in the U.S. and not advertised in mass media until November 1986 speech by Surgeon General C. Everett Koop on AIDS prevention."

A