Vibia Sabina (83–136/137) was a Roman Empress, wife and second cousin, once removed, to Roman Emperor Hadrian. She was the daughter to Salonina Matidia (niece of Roman Emperor Trajan), and suffect consul Lucius Vibius Sabinus. After her father’s death in 84, Sabina along with her half-sisters lived with their grandmother, mother and were raised in the household of Trajan, his wife Pompeia Plotina and her stepfather.
She married Hadrian in 100, at the Roman Empress Pompeia Plotina's request, for Hadrian to succeed her great uncle, in 117. Sabina's mother Matidia (Hadrian's second cousin) was also fond of Hadrian and allowed him to marry her daughter.
Sabina was strong and independent and her beliefs in marriage didn't sit well with the Emperor. Sabina had an affair with Suetonius, a historian (and Hadrian's secretary), in the year 119. In 128, she was awarded the title of Augusta. Vibia Sabina died before her husband, some time in 136 or early 137. Hadrian's stone elegy for his wife "depicts the apotheosis, or divine ascent of Sabina in accordance with her posthumous deification on the order of Hadrian."
Read more about Vibia Sabina: Namesake, Nerva–Antonine Family Tree