Fedelm Ingen Oengusa of the Uí Théig Queen of Ossory
Lassi ingen Fergna married Aengus (Óengus) of the Uí Théig, Leinster [1]
Notes
Finamnail was the ancestor of the Uí Théig (O'Tighe) established north of Uí Máil territory [2] Both Uí Máil and Uí Théig descend from Máine Mál [3]
Sources
↑ "573442. Óengus (of Uí Teig) [WUD] [Note: Different version of WUD disagree as to whether his father's name was Daui or Dubthach son of Daui, so his parentage is listed here as unknown. To my knowledge, neither Óengus, nor his wife Lassi, nor any of their ancestors, appear in any source other than WUD.]" -- "573443. Lassi ingen Fergna (of Uí Máil) [WUD]" Llywelyn ap Iorwerth ancestor table compiled by Stewart Baldwin]
↑ Wikipedia : Uí Máil
↑ Codecs Online Data : early Leinster kings and dynasties
Begat Us : Lassi ingen Fergna
Birth: 520, Dublin, Ireland. Source: #S48. Record for Fedelm Ingen Mor; Death: Ireland. Source: #S48. Record for Fedelm Ingen Mor; Source S48 Ancestry.