פלג was born in 1757. פלג's father was עבר. His paternal grandparents were שלח and Muak ben Kesed. He was an only child. He died, at the age of 239, in 1996.
פלג and Lomna bint were married (further details are not known).
They had three sons and a daughter, named רעו, Daughters bint, Kaber ben and Sons ben.