20. TWENTY GENERATIONS BACK: OUR 18th GREAT-GRANDPARENTS
In this generation, each (# n) represents a blood-relationship of about 0,000095 %

(To younger generation), (To older generation)

Sixteen known (or presumed) ancestors in this generation:

(# 1198096 = Jan Heijmensz. van Rijswijk) (see 21 generations back)

(# 1198100) Roelof II van Dalem
(# 1198101) Beatrix van Duivenvoorde
(# 1198102) Boudewijn Jansz. van Rijswijk

(# 1230864 = Jan Heijmensz. van Rijswijk)

(# 1230868 = Roelof II van Dalem)
(# 1230869 = Beatrix van Duivenvoorde)
(# 1230870 = Boudewijn Jansz. van Rijswijk)

(# 1248256) Jan I van der Dussen ?
(# 1248257) Elisabeth van Polanen ?

(# 1248528) jonkheer Willem van Drongelen ?

(# 1251984) Dietrich II of Heinsberg
(# 1251985) Kunigunda van der Marck

(# 1256768) Wisschaert van Uitwijk

(# 1516544) Willem III of Avesnes, Count of Holland and Hainaut
(# 1516545) jonkvrouwe ? de Moor

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