In 241 her father was appointed the head of the Praetorian Guard by the Roman Emperor Gordian III. In May that year, Tranquillina had married Gordian. She became a Roman Empress and received the honorific title of Augusta. Her marriage to Gordian was an admission by the young emperor of both Timesitheus' political indispensability and Tranquillina’s suitability as an empress.
Reddish purple indicates emperor of the Nerva-Antonine dynasty;
lighter purple indicates designated imperial heir of said dynasty who never reigned;
grey indicates unsuccessful imperial aspirants;
bluish purple indicates emperors of other dynasties
dashed lines indicate adoption; dotted lines indicate love affairs/unmarried relationships