Even after Carloman was rechristened " Pepin " , Charlemagne maintained the older Pepin at his court , right alongside Charles the Younger , one of Charlemagne 's sons by Hildegard .
Head entity: charles the younger Q283107 20 21 22
Tail entity: charlemagne Q3044 9 26
Relation (head \u2192 tail): P22
Inverse relation (tail \u2192 head): P40