HiI don't know the connection, but in NEwport Rhode Island one of the oldest neighborhoods is called "the Point' and people from that neighborhood have been called "hummers" for at least 100 - 150 years, as in "He's a real, old point hummer!" meaning, an old timer, a native...
John "fud" Benson, a nationally known artist, and incidentally a fine folk musician, lived on the shore there for many years and had a lobsterman's skiff named "Point Hummer" That neighborhood was settled around 1650 and has a lot of historical assocaitions dating back to when they hung 17 pirates in a row on the beach by the end of what is now Washington Street...so you can make any folk association you want with the sea or old-timers
Matt McConeghy