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Son of Samuel Croëll and Gertrud von Euthen Brother of Anna Cröell; Elisabeth Samuelsdotter Cröell; Samuel Samuelsson Croëll; Johan Samuelsson Croëll and Anna Samuelsdotter Croëll
Jully Ramsayn mukaan (lähteenä ilmeisesti Lagus, Gabriel: "Ur Wiborgs historia" 1893) Gert on mainittu 1654. (Mentioned in 1654.)