Tadg in Eich Gil explained

Tadg in Eich Gil ("Tadhg of the White Steed";^[1] died 1030) was king of Connacht.

Family tree

     Cathal mac Conchobar mac Taidg, d. 1010.
     |
     |__________________________________________________________________________________________________
     |                   |                            |          |             |                       |
     |                   |                            |          |             |                       |
     Dub Chablaigh       '''Tadg in Eich Gil'''             Brian,     Conchobor,    In Cléirech, fl. 1044.  Tadhg Díreach
    =Brian Boru         =?                           d. 1029      fl. 1029.    |                       |
     |                   |                                                     |_________              |
     |                   |                                                     |        |              An Gilla Lónach
     Domnall?            Áed in Gai Bernaig,                                   |        |
     |                     King of Connacht,                                    Tadg,    Conchobar,
     |                        died 1067.                                       d.1056.    d. 1069.
     Diarmait,
     d. 1051.

References

Leabhar na nGenealach, Dublin, pp. 484–85, p. 614-15, 2004–2005
Annals of the Four Masters, ed. John O'Donovan, Dublin, 1856
Annals of Lough Ce, ed. W.M. Hennessey, London, 1871.
Irish Kings and High Kings, Francis John Byrne, 3rd revised edition, Dublin: Four Courts Press, 2001.
"Ua Ruairc", in Seán Duffy (ed.), Medieval Ireland: An Encyclopedia. Routledge. 2005. pp.

Notes and References

Routledge Revivals: Medieval Ireland (2005): An Encyclopedia. (2017:464). United Kingdom: Taylor & Francis.