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Male Emperor Flavius (Constantine I The Great) Valerius Constantius Click to view Emperor Flavius (Constantine I The Great) Valerius Constantius in the family tree

Flavius, known as Constantine I The Great, was born on February 27th, 0273 in Naissus, Siberia.1   Constantine I The Great's father was Emperor Gaius Flavius Valerius Constantius and his mother was Helen Colchester.  His paternal grandparents were Flavius Eutropius of the Gordiani and Claudia Crispina Illyria; his maternal grandparents were King of Northern Britain Coel (Old King) Hen ap Tegfan and Strada of Cambria. He had three half-brothers and three half-sisters, named Hannibalianus, Constantius, Julius, Eutropia, Anastasia and Constantia.  He died at the age of 64 on May 22nd, 0337.1 

Family Details of Constantine I The Great's family with Minervina

Family Details of Constantine I The Great's family with Flavia Maximiana

1 http://wc.rootsweb.com/cgi-bin/igm.cgi?op=GET&db=jdp-fam&id=I11587

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