One of my favorite cases of reanalysis gone amok is:
[(xocalia + a'tl) => chocola-tl => chocolate => choco-] + [(al-kuhl => alcohol) + (-ique => -ic) => -holic] => chocoholic
which, having contributions from Nahuatl, Arabic, and Latin results in a word with morphemes originating in 3 distinct language families.
On the topic of article rebracketing, I also love "an eke-name" (an extra name) becoming "a nickname".