The O'Dwyer Pedigrees recorded by O'Hart.

Adapted from John O'Hart, Irish Pedigrees, or The Origin and Stem of the Irish Nation, (James Duffy, Dublin, 1892) pp. 44-55, 351-355, 430-432, 640, 641.

[O'Hart lists three lineages of the Dwyer name:

• Dwyer (No. 1) of Leinster and Munster, Lords of Kilnamanagh, Co. Tipperary.
• Dwyer (No. 2) of Kilnamangh.
• Dwyer (No. 3) of Ulster. This appears to have been an unconnected family of the same anglicised name derived from O'Dubhfir (dubhfear - the dark-featured man). No detailed genealogy is given other than to state that it was connected to the O'Hart pedigree.

The first two shared the same stem as described below, while the third was apparently unrelated. It is worth noting that there is a striking similarity between names 5 to 9 of the O'Dwyer (No.1) pedigree and names 20-24 of O'Dwyer (No. 2). This suggests the possibility that the two genealogies were perhaps differing folk memories referring to the same line, rather than two distinct branches. Note also the two differing interpretations of the origin of the name O'Dwyer (in Irish O'Duibhir, with variants O'Dubhiire, O'Duibhidhir), a matter that remains somewhat controversial. It is also worth pointing out that neither of these pedigrees appears to line up with the 'official' genealogy of the O'Dwyer chiefs held at the Chief Herald's office in Dublin]