Atkinson (Kilbarron)
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Atkinson (Rahans)
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Atkinson (Rockcorry)
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Atkinson (Sallymount)
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Atkinson (Tedavnet)
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Attridge (Cork)
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Auchmuty
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Austen/Austin (Cork)
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Austin (Inishowen)
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Avery
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Aylmer (Croagh)
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Aylmer (Derry)
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Aylward
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Babington (Cork and Westmeath)
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Babington (Kilmacrenan)
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Backhouse
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Bagge (Waterford)
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Bagnell
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Bagot (Bagotstown, Ballyturin & Aghrane/Castlekelly)
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Bagwell (Kilmore)
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Bagwell (Marlfield)
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Bagwell Purefoy
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Bailey
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Bailey (Cork)
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Bainbridge
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Baker (Cloongee)
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Baker (Lismacue)
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Baker (Redhill)
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Baker/Cole Baker
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Baldwin
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Baldwin (Glandore)
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Baldwin (Mount Pleasant)
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Baldwin (West Muskerry)
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Balfe
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Ball
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Ball (Fort Fergus)
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Banes
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Banfield
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Barber (Sligo)
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Barbor/Barbour
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Barclay
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Barfoot
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Barker (Raphoe North)
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Barker/Ponsonby Barker
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Barlow (Co Roscommon)
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Barlow (Co Tipperary)
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Barnes
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Barnewall
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Barrett (Carrigboy)
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Barrett (Culleenamore)
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Barrett (Curraghanearla)
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Barrett (Greenhills & Ballintava)
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Barrett-Lennard
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Barrington (Glenstal)
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Barron
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Barry
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Barry (Ballyclogh)
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Barry (Ballynahina)
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Barry (Castle Cor)
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Barry (County Kerry)
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Barry (Dublin)
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Barry (Dunbulloge)
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Barry (Dundullerick)
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Barry (Friarstown)
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Barry (Gort)
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Barry (Kanturk)
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Barry (Kilbarry)
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Barry (Kilbolane)
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Barry (Leamlara)
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Barry (Rath)
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Barry/Harold-Barry
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Barry/Smith-Barry (Ballyedmond)
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Barry/Smith-Barry (Fota)
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Barter (County Cork)
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Bartley
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Bartley (Bartley's Grove)
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Barton
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Barton (Carrickmacross)
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Barton (Greenfort)
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Barton (Grove)
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Barton (Rochestown)
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Bastable
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Bateman
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Bateman (county Mayo)
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Bateman (Grousehall)
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Bateson
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Batt
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Battersby (Lislin)
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Battersby (Lough Bawn)
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Batty (Mayo)
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Batty/Batley
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Baxter
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Baylee/Bayley (Mount Baylee)
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Bayley (Rookwood)
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Bayley/Bailey
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Bayly (Debsborough)
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Bayly/Bayley
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Beamish
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Beamish (Mount Beamish)
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Beare (Cork)
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