Born in 2948 3A, Elfhild grew up to become a Rohirrim Soldier in the military. That was when she first met Prince Théoden. After the death of King Thengel, Elfhild married Théoden and became the Queen of Rohan. She gave birth to her first child and named her Idis. Three years later, Elfhild passed away from childbirth after she gave birth to her second child named Théodred, leaving Théoden a widower and both Idis and Théodred motherless. At the time of the War of the Ring, Rohan had been without a queen for twenty-three years.