Family records often contain subtle details about the individuals they list. The appearance of the name Ulla in the genealogy introduces a figure whose name would eventually become highly recognized and famous centuries later during the Talmudic era [ביאור שטיינזלץ].
The exact identity of this man is a subject of discussion. One possibility is that he is actually someone who has already been mentioned earlier in the family lists, simply going by a second name [מצודת דוד]. Another perspective suggests that he and his children are part of the family line of Jether, a figure noted slightly earlier in the records.
When detailing this branch of the family, the focus rests entirely on the sons rather than on Ulla himself. He is not counted as an independent link in the chain of generations. This omission occurs because he did not hold the rank of a patriarch or head of a household in his own right. That specific leadership status and authority belonged exclusively to his sons [מלבי ם].