Harald Sigtryggrsson was King of Limerick. He was killed in Connaught, Ireland in 940.
History of the Norwegian people - Page 497
by Knut Gjerset - Norway - 1915
Scandinavian Britain -
by William Gershom Collingwood, Frederick York Powell - 1908
Britain and Ireland, 900-1300: insular responses to medieval ... - Google Books Result
by Brendan Smith - 1999