He was a member of the Nerva-Antonine dynasty. Early in his political career, Hadrian married Vibia Sabina, grandniece of the ruling emperor, Trajan. The marriage and Hadrian's later succession as emperor were probably promoted by Trajan's wife Pompeia Plotina. More @Wikipedia
Hover over any link to get a description of the article. Please note that search keywords are sometimes hidden within the full article and don't appear in the description or title.