Diane & others,
I have made a summary of the 1500 entries for Halpen/Halpin/Halfpenny etc.in the IGI Index, (not inc. Ancestral, Pedigree Resource files or Census).
County/ No. of entries/ Time span
Antrim 26, 1841-1950s
Armagh 1, 1865
Carlow 32, 1808-1879
Cavan 15, 1846-1878
Clare 75, 1788-1882
Cork 13, 1788-1877
Donegal 1, 1833
Down 9, 1864-1879
Dublin 217, 1 fem.mar.1727, rest 1760-1908
Fermanagh 10, 1865-1904
Galway 18, 1864-1880
Ireland (no county) 300, 1734-1946
Kerry 64, 1830-1880
Kildare 8, 1864-1878
Kilkenny 2, 1843-1866
Laoighis 5, 1756-1849 (inc 1 mar. & 2 approx birthdate for Eliz Halpen)
Leinster Province 19, 1781-1840 (few W’meath, mostly Ossory)
Leitrim 1 1834
Limerick 327, 1741-1905 (& 1 dubious 1676)
Longford 6, 1844-1880
Louth 55, 1783-1993
Mayo 1 1866
Meath 122, 1819-1966
Monaghan 13, 1812-1873
Tipperary 44, 1810-1912 (inc 4 birth & 4 mar. for same Honora H.)
Tyrone 3, 1846-1866
Waterford 19, 1709-1917
Westmeath 9, 1860-1878
Wexford 1, 1845 (mar.)
Wicklow 48, 1845-1879 (mostly 1860s & 1870s)
These figures are of course not conclusive, they are an indication only. Many events have been duplicated, and many others, probably the majority, are missing.
Leinster Province covered a number of counties, but most entries are from the Diocese of Ossory, which I believe was based in Kilkenny town.
The earliest reliable Halpen we know is Padgitt Halfpenny, of Queens Co. b. 1682 (from TCD Register).
Ken