Lethlobar mac Loingsig
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Lethlobar mac Loingsig (died 873) was a Dál nAraidi king of Ulaid, in medieval Ireland. He was the grandson of Tommaltach mac Indrechtaig, a previous king of Ulaid. He belonged to the main ruling dynasty of the Dál nAraidi known as the Uí Chóelbad based in Magh Line.