Mahalalel child Jared
Biblical narrative
Mahalalel was born when his father Kenan (Adam's great-grandson through Seth) was 70 years old. He was one of many children of Kenan. (Genesis 5:12-13; 1 Chronicles 1:2; Jubilees 4:14 Luke 3:37). 
When he was aged 54-60, Mahalalel married Dinah, the daughter of his paternal uncle Barakiel. At the age of 65, he fathered Jared (when the Watchers "descended on the earth" as per Jubilees 4:15). He fathered many other children after that point (Genesis 5:15-16).  
At the age of 227, he became a grandfather to Jared's son Enoch (Genesis 5:18), who was born through Baraka, the daughter of Mahalalel's brother Râsûjâl (Jubilees 4:16). 
Sometime before he turned 292, Mahalalel explained to Enoch the first of the two dream visions the latter had, as recounted through the perspective of Enoch:
offspring progeny issue descendant heir