In Genesis 34:2
And when Shechem the son of Hamor the Hivite, prince of the country, saw her, he took her, and lay with her, and defiled her.
the term "of Hamor" comes from H2544 / Chamowr / חֲמוֹר which means ass / donkey.
From Gesenius' Hebrew-Chaldee Lexicon
one can extract there's no negative connotation in this particular passage.
Considering we're in Genesis and it's not the first time the names are full of extra references (for example, Genesis 30), I can't overlook the potential double meaning here too.
From my understanding, this could be potentially two sided
- A way to call "Shechem" an ass, from what he did to Dinah (Genesis 34:2)
- There are specific character traces from Hamor which would enable one back then to call him "ass" (be that having his son, Shechem, seduce Dinah (and this would imply knowing more about the culture which the author wrote))