This makes Poppo part of an early collateral line of the Robertians related to the French royal family of the Capetians.
A Christian I, Hesso I and II, Burkhard and Liutolf are known to be counts in Grabfeld (and direct relatives thereof), but their affiliation to the Popponids is not proven.
Christian I with his wife Heilwig is sometimes placed between Poppo (~770-839/841) and his (grand-)son Henry (~830-886) to explain a time gap between the two, but his name is not repeated in following generations.
His death may have enabled his distant cousin Count Odo to carve out an increasingly important role for his descendants, the House of Capet.
In 892, after having advised in favor of a failed expedition against the Slavs, he was deposed by Charles' successor King Arnulf of Carinthia, who put his relatives the Conradines in charge of Thuringia instead.
The Babenberger Feud would have already started as early as 892, when Arnulf appointed his Conradine relatives and dismissed Poppo as margrave of Thuringia.
Both sides clashed again during the battle of Fritzlar on 27 February 906, where the Conradines won a decisive victory, although their leader Conrad the Elder fell.
[7] The sole survivor of the three Babenberg brothers, Adalbert, was summoned before the royal court by the Regent, Archbishop Hatto I of Mainz, a partisan of the Conradines.
Conrad the Younger now became the undisputed Duke of Franconia and later, after the early death of Louis the Child, King of the East Frankish Kingdom in 911.
Count Babo's origins are unclear, but he could have been another son or grandson of Henry III, or alternatively could have descended from Poppo II.
Cancor (died 771), of Robertian ancestry, Count of Hesbaye, co-founder of Lorsch Abbey ⚭ Angila A schematic tree of the most important Popponids and their branches is shown below.