Help with crest please

[jacksonsvl19l]

Hello. I would appreciate some help with this crest.
It is on a silver piece from London, made 1810.
I've done some research online, and the closest I've found are that of the family Moriarty, and of clan Munro.
I appreciate any assistance. Thanks.

[Traintime]

Stangely similar to the maker mark for Mayo & Co. Chicago, Illinois (1896-c.pre 1904?). Could it relate to the Mayo name?

[nobilityhouse]

The crest is an eagle displayed. It could also be blazoned as an eagle with wings displayed and elevated. Eagles are popular and this can be found as a crest for one of the branches of the Moseley family, and one of the Williams family, and quite a few branches of the Browne family. There may be others. I don't think I could state exactly who this is for. Kind regards.