The Anscarids (Latin: Anscarii) or the House of Ivrea were a medieval dynasty of Burgundian and Frankish origin which rose to prominence in Northern Italy in the tenth century, briefly holding the Italian throne.

The Spanish House of Trastámara, which ruled in Castile, Aragon, Naples, and Navarre at various points between the late 14th and early 16th centuries, was an illegitimate cadet branch of that family.

The founder of the family's fortunes was a petty Burgundian count named Anscar, who, with the support of the powerful archbishop of Rheims, Fulk the Venerable, brought Guy III of Spoleto to Langres to be crowned King of France in 887.

Their plot failing, Anscar and his brother accompanied Guy back to Italy with 500 Burgundian troops to seek the throne of Berengar I.

He was opposed, immediately, by Lothair's widow Adelaide, whom he imprisoned after his attempt to force her marriage to his son, Adalbert II, failed.

[citation needed] Raymond, fourth son of Count William I of Burgundy, travelled to Castile-León in the late eleventh century and there married Urraca, the future monarch.