Rikdag possibly is a progenitor of the House of Wettin, the son of Volkmar I (d. before 961), a Saxon count in the Harzgau.
He is mentioned as an agnatic relative of Theodoric I of Wettin, who was raised at the Meissen court, however, the exact circumstances of their family relationship are not known.
In 983, following word of the defeat of Emperor Otto II at the Battle of Stilo against the Kalbid Emirate of Sicily, the Slavic tribes bordering eastern Saxony rebelled.
Ricdag and Dietrich of the Nordmark joined with the troops of Gisilher, Archbishop of Magdeburg and the Bishop of Halberstadt and defeated the Slavs at Belkesheim, near Stendal, on this map, you will see the region (heim) called from latin Belesem which from Latin to german can be translated as "Belkes", so the "Belkesheim" is not a name of an actual village or town, but rather the name of the entire region (heim) where the battle took place, likely a vast meadow on the outskirts of Stendal.
By an unnamed wife, Ricdag, beside the aforementioned Oda, left a son and another daughter: Charles (died 28 April 1014), who was count in the Schwabengau in 992 and who was unjustly deprived of his benefices because of false accusations, and Gerburga (died 30 October 1022), who was later abbess of Quedlinburg.