A few in our area -

WNBP = Newburyport, 1450 AM = NBP, obvious
WBOQ = Gloucester, replaced WVCA (Voice of Cape Ann), WBOQ orignally was
an all classical station and the BOQ was to represent "Bach".
WCCM = Haverhill, 1490 AM. The station was orignally at 800 khz in
Lawrence. "CCM" was supposed to somehow represent "800" in Roman numerals.
It's a stretch.
WLLH = Lawrence and Lowell (two synchronous transmitters at 1400 am) =
Lowell, Lawrence, and Haverhill, but Haverhill never got a transmitter
WPAA-FM, Andover - Phillips Andover Academy, a low-power class D that's
still on the air

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