Ada of Holland
Ada of Holland was the daughter of Floris III, Count of Holland and his wife Ada of Huntingdon. She was the sister of Dirk VII, Count of Holland and William I, Count of Holland.
In 1176 she married Otto I of Brandenburg, becoming Margravine of Brandenburg until his death in 1184. This was Otto's second marriage. He had been married to Judith of Poland. Otto already had two sons from his marriage to Judith, Otto in 1149, and Henry in 1150.
Ada and Otto had a son named Albert II who would in time succeeded his half-brother Otto II as Margrave of Brandenburg in 1205.
After Otto's death, she married his son, Otto II, from his first marriage, but that marriage ended childless.
