I doubt
Kelly was used as a Victorian first name. Irish surnames are a new phenomenon. And when Victorians used surnames, they were nearly always upper-class people using surnames that were (a) fancy English ones and (b) family names, or names with some other definite reasoning behind them.
Besides, the Irish were much looked down on by the British in Victorian times, partly because in the British context, Irish equalled working-class and an immigrant, and the Victorians were snooty that way. I'm sure that an aristocratic family would be amazed at the use of
Kelly,
Ryan,
Reagan or anything like that. The situation in the States was probably different, but as you said "Victorian" I assumed you meant in Britain :-S
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"Dream like you'll live forever. Live like you'll die today."
♥
Elinor♥