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Madadhan is an Irish name commonly anglicised as Madden and Madigan.^{[citation needed]} Whilst originally a forename, it also became the surname Ó Madadhan, meaning "descendant of Madden".

• Ambrose Ó Madadhan, first Prior of Portumna Priory
• Anmchadh Ó Madadhan, Chief of the Name, died 1636
• Breasal Ó Madadhan, Lord of Síol Anmchadha and Chief of the Name, died 1526
• Cathal Ó Madadhan (died 1286), King of Síol Anmchadha
• Diarmaid Cleirech Ua Madadhan (died 1207), King of Síol Anmchadha
• Diarmaid Ua Madadhan (died 1135), King of Síol Anmchadha and Uí Maine
• Domhnall Ó Madadhan, chief of Síol Anmchadha, fl. 1567 – after 8 March 1611
• Eoghan Carrach Ó Madadhan, Chief of Síol Anmchadha, fl. 1451
• Eoghan Mór Ó Madadhan, Chief of Síol Anmchadha, fl. 1371–1410
• Eoghan Ó Madadhan, Chief of Síol Anmchadha, fl. 1314–1347
• John Ó Madadhan, Lord of Síol Anmchadha and Chief of the Name, died 1556
• Madudan Mór Ua Madadhan, King of Síol Anmchadha, died after 1158
• Madudan Óg Ó Madadhan (died 1235), King of Síol Anmchadha
• Madudan Reamhar Ua Madadhan, Chief of Síol Anmchadha, 1069–1095
• Melaghlin Ua Madadhan (died 1188), King of Síol Anmchadha
• Murcadh Ó Madadhan, Chief of Síol Anmchadha, died 1451
• Murchadh Ó Madadhan, King of Síol Anmchadha, died 1327
• Murchadh Reagh Ó Madadhan, Chief of Síol Anmchadha, died 1475
• Owen Ó Madadhan, Lord of Síol Anmchadha and Chief of the Name, fl. 1475
• Richard Ó Madadhan, Prior of Portumna Priory in 1691

• Madden (surname), a page for people with the surname Madden
• Maddin, a page for people with the surname Maddin