Here are three named Peter McMahon from county Kerry.
Peter McMahon
New York, Passenger Arrival Lists (Ellis Island), 1892-1924
residence: Inch, Ireland
immigration: 17 May 1911
Peter Mcmahon
Ireland Marriages, 1619-1898
birth: 1846
marriage: 10 November 1866 Tarbert, Kerry, Ireland
father: James Mcmahon
spouse: Johanna Mangan
other: Cornelius Mangan
Peter McMahon
Find A Grave Index
death: 5 September 1982
burial: 1982 Ballybunion, , County Kerry, Ireland