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≈ Reconstructed person · research hypothesis

Claes Sijmonsz van Heemskerck

observed 1605–1610possible birth 1510–160519 observations2 name variantsmedium confidence

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Why are these mentions grouped?

Name normalization or a strong historical spelling match and compatible chronology support this grouping. Less distinctive names require narrower time windows or recurring relationships.

Method code: fuzzy-name+adaptive-chronology-v2

Observed name forms: Claes Sijmonsz van Heemskerck · Claes Sijmonsz van Heemskerk

Supporting registrations

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