I was thinking about 氡, radon recently. The pronunciation: dōng (dong1) seems to suggest that sound was borrowed from the ending of the English word. Wiktionary corroborates this theory:
Borrowed from English radon.
This is quite interesting because most loanwords seem to come from the beginning of words, if anything, and especially not the middle or the end of a word. You might expect some form of:
rui, for instance, for radon.
What other loan words exist where the sound was borrowed from the middle/end of the original word?