SOURCE-14184Research NeededProbable
Charles Cawley, "HOLLAND & FRISIA: Chapter 2. COUNTS OF HOLLAND [900]-1299", Med...
Full citation
Charles Cawley, "HOLLAND & FRISIA: Chapter 2. COUNTS OF HOLLAND [900]-1299", Medieval Lands, Foundation for Medieval Genealogy, March 2015, http://fmg.ac/Projects/MedLands/HOLLAND.htm#FlorisIdied1061,accessed 22 August 2015.