Nielsen Hayden genealogy

David Williams, "Pierre I de Grandson and His Family." Foundations, journal of the Foundation for Medieval Genealogy, volume 14, 2022.

• Title	David Williams, "Pierre I de Grandson and His Family." Foundations, journal of the Foundation for Medieval Genealogy, volume 14, 2022.
  Source ID	S6266
  Linked to (20)	(Unknown daughter of Amadeus I of Geneva) (Unknown second wife of Amadeus I of Geneva) Amadeus I Gertrud Agnes de Grandison Ebel de Grandison Katherine de Grandison Mabel de Grandison Pierre de Grandison William de Grandison William de Montagu Agnès de Neufchâtel Ulric III de Neufchâtel John de Northwode John de Pateshulle John de Tregoz Sibyl de Tregoz Jolante of Urach Family: Pierre de Grandison / Agnès de Neufchâtel Family: Ulric III de Neufchâtel / Jolante of Urach