Biography

Constans was magister militum per Thracias in 412. In 414 he held the consulship

Roman consul

A consul served in the highest elected political office of the Roman Republic.Each year, two consuls were elected together, to serve for a one-year term. Each consul was given veto power over his colleague and the officials would alternate each month...

 (possibly while he still was magister militum); he took office in Constantinople

Constantinople

Constantinople was the capital of the Roman, Eastern Roman, Byzantine, Latin, and Ottoman Empires. Throughout most of the Middle Ages, Constantinople was Europe's largest and wealthiest city.-Names:...

.

His name is a clue of a potential relationship to Flavius Constantius, his Western colleague in the consulate and later Western Emperor with the name of Constantius III

Constantius III

Flavius Constantius , commonly known as Constantius III, was Western Roman Emperor for seven months in 421. A prominent general and politician, he was the power behind the throne for much of the 410s, and in 421 briefly became co-emperor of the Western Empire with Honorius.- Early life and rise to...

; however the sources do not mention any relationship among the two.