Who was Pallu?

Separated, the second son of Reuben (1 Chr. 5:3); called Phallu, Gen. 46:9. He was the father of the Phalluites (Ex. 6:14; Num. 26:5, 8).

Pallu first appears in Exodus 6:14. In this repository’s biblical text, this figure is associated with 4 verse mentions across 3 books, most notably Numbers, Exodus, 1 Chronicles.