Tenpenny, Tempeny
Tenpenny, Tempeny—These two names are the anglicised forms of the name Mac An Tiompanaigh, the Son of the Tempanist; the tempane being an old Irish stringed instrument which was played with a bow like the fiddle.
Alphabetical Index of Anglicised Surnames in Ireland
See also Woulfe’s Irish Names and Surnames
… and O'Hart's Irish Pedigrees