This file includes biographies, obituaries and other material relating to the following people of interest: Thomas O’Crohan; Conchubhar Ó Cuileanáin; Micheál Ó Cuileanáin (Micheál, Eibhle); Fr Micheál Ó Dálaigh; Pádraig Ó Dálaigh; Seán Ó Dálaigh ("Common Noun"); Máirtín Ó Direáin; Breandán Ó Doibhlin; Niall Ó Dónaill; Bishop Pádraig Ó Dónaill; Seán Ó Donnabháin; Diarmaid Ó Donnabháin Rosa; Tadgh O'Donoghue; Seán Ó Dúbhda.

Tag / Ref: G60/26/8/17

This file includes biographies, obituaries and other material relating to the following people of interest: Tomás Ó Concheanainn ("Tomás Bán", "Níosáirde"); Séamas Ó Conghaile; Seán Ó Conghaile; Daniel Corkery.

Tag / Ref: G60/26/8/16

This file includes biographies, obituaries and other material relating to the following people of interest: Pádraig Ó Cléirigh; Eoghan Ó Comhraí; Pádraic Ó Conaire ("Cois Leasa", "Caoilte na gCos").

Tag / Ref: G60/26/8/15

This file includes biographies, obituaries and other material relating to the following people of interest:Gearóid Ó Cairealláin; Michael O'Keefe; Maolsheachlainn Ó Caollaí; Seán O'Casey; Mártan Ó Ceallaigh; Seán Ó Ceallaigh ("Sceilg"); Seán T Ó Ceallaigh; Breandan Ó Cearbhaill; Peadar Kearney; Dónall Ó Ceocháin.

Tag / Ref: G60/26/8/14

This file includes material relating to Máirtín Ó Cadhain.

Tag / Ref: G60/26/8/13

This file includes biographies, obituaries and other material relating to the following people of interest: Ellen Donovan; Louise Gavan Duffy; Agnes O’Farrelly ("Uan Uladh"); Máiréad Ní Ghráda; Nessa Ní Shéaghdha; Máire Ní Shíthe ("Dul Amú"); Sr Columbanus Ní Shúilleabháin; Brendan Behan; Pilib Ó Bhaldraithe; Ruairí Ó Bléine; Donnchadh Ó Briain; Fr Pól Ó Briain; Giolla Chríost Ó Broin; León Ó Broin; Liam Ó Buachalla.

Tag / Ref: G60/26/8/12

This file includes biographies, obituaries and other material relating to the following people of interest: Lil Nic Dhonnchadha; Seosaimhín Nic Eoghagáin; Eibhlín Ní Chathailriathaigh; Áine Ní Cheanainn; Máire Ní Chinnéide; Íte Ní Chionnaith.

Tag / Ref: G60/26/8/10

Tag / Ref: G60/17/2/5

This subseries contains various correspondence including from Fr Peter O'Leary to Fr Pádraig [de Búrca] and An Craobhín Aoibhinn [Douglas Hyde] (G60/44/2/1); correspondence to Fr Peter from Eugene O'Growney, Domhnall Mac Cáib (McCabe), Patrick Stanton, Michael O'Hickey, Seosamh Laoide and Risteard Ó Foghludha ("Fiachra Eilgeach") (G60/44/2/2); and correspondence to Reverend Pádraig de Barra from Tadhg Ó Néill, Anna Nic Iain and Seán Ó Criomhthain [O'Crohane] (Blasket Islands).

Tag / Ref: G60/44/2

This sub-subseries relates to other Conradh na Gaeilge commemorations such as the 75th anniversary of Ballinasloe branch Craobh Ghrealláin in 1977; the 10th anniversary of Scoil Raifteirí in 1993 and the 50th anniversary of the death of Seumas [sic] O’Kelly (1968) as well as material produced by individual branches to mark Conradh na Gaeilge’s centenary.

Tag / Ref: G60/16/1/2