Visc. Etienne I of Thiers 
Etienne I of Thiers' father was Matfroi of Auvergne. His paternal grandparents were Visc. Arnaud I of Auvergne and Bertilde. He was an only child. He died about 0955.General Notes
pg. 80, "The Plantagenet Ancestry" by W.C. Turton, published 1928
They had a son named Gui II of Thiers.
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