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From Rodovid EN

Lineage	Вяземские
Sex	Male
Full name (at birth)	Роман Константинович Вяземский
Parents ♂ Константин Фёдорович Вяземский [Вяземские]

Events

child birth: ♂ Фёдор Романович Вяземский [Вяземские]

title: князь Вяземский

From grandparents to grandchildren