https://research.annefrank.org/nl/personen/d7b04c99-7eba-48af-aea0-99b4d816cf90/
He was actually Dutch (naturalized)
See: https://archief.amsterdam/indexen/deeds/985333ff-9acb-56a3-e053-b784100ade19?person=985333ff-9acc-56a3-e053-b784100ade19