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Catholic Encyclopedia: St. William of Ebelholt
Also called William of Paris or William of the Paraclete. Twelfth-century canon.
Catholic Encyclopedia: St. William of Paris
This appears to be a second article about the same person. Gives a different feast day, and the year of death is one year different.
Catholic Online
Brief paragraph on St. William of Eskilsoe.
For All the Saints
Biography of St. William of Eskhill, also called William of Eskilsöe or William of Aebelholt.