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Gerardus Heemskerk
- ☼ 16-04-1876 (Alkemade [ZH])
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Cornelia Loogman
- ☼ 31-10-1870 (De Kaag [ZH])
- ✞ 28-07-1949 (Haarlemmermeer [Nh])
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Nicolaas Heemskerk
- ☼ 31-05-1905 (Hillegom [Zh])
- ✞ 05-06-1905 (Hillegom [Zh])
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Wilhelmina Heemskerk
- ☼ 01-08-1909 (Hillegom [Zh])
- ✞ 06-01-1911 (Haarlemmermeer [Nh])
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