SB 8.5.7
sasthas ca caksusah putras
caksuso nama vai manuh
puru-purusa-sudyumna-
pramukhas caksusatmajah
Translation by His Divine Grace A. C. Bhaktivedanta Swami Srila Prabhupada:
The son of Caksu known as Caksusa was the sixth Manu. He had many sons, headed by Puru, Purusa and Sudyumna.