Bertholde was born about 0743 in Bavaria. Bertholde's father was Ruthard and his/her mother was Herminlin(Herminlindis). His/her paternal grandfather was Richbold and his/her paternal grandmother is Ermengard; his/her maternal grandfather is Bertholde. He/she had a brother named Guelf von Altdorf. He/she is the older of the two children.