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From Rodovid EN

Lineage	Jelling
Sex	Male
Full name (at birth)	Haakon de Danemark

Notes

Ancestry hypothesis :

fr:Гунхильда (-, b. estimated 945 d. before 970)		Haakon de Danemark
fr:Harald Gormsson (Bluetooth) (Jelling, b. 910 d. 1 December 986)

From grandparents to grandchildren