How Old Were the Fathers?

David, 32 Who was of Jesse, who was of Obed, who was of Booz, who was of Salmon, who was of Naasson, 33 Who was of Aminadab, who was of Aram, who was of Esron, who was of Phares, who was of Judas, 34 Who was of Jacob, who was of Isaac, who was of Abraham,*

1) Who was of Jesse, 2) who was of Obed, 3) who was of Booz, 4) who was of Salmon, 5)who was of Naasson, 33 6) Who was of Aminadab, 7) who was of Aram, 8) who was of Esron, 9) who was of Phares, 10) who was of Judas, 34 11) Who was of Jacob,

Roman Martyrology, chronology		Ussher chronology
Abraham born 2015 BC, David anointed 1032 BC. Isaac born 1915 BC, David anointed 1032 BC. Jacob born 1855 BC, David anointed 1032 BC. Jacob born 1855 BC, David born 1062 BC.		Jacob born 1836 BC, David anointed 1055 BC Jacob born 1836 BC, David born 1085 BC
1855 - 1062 = 793 years. 793 / 11 = 72 years per generation.		1085 - 1836 = 751 years 751 / 11 = 68 years per generation

Booz married Ruth late. Jesse had 6 sons and I don't know how many daughters before David. Phares was born after Judah had already lost two adult sons.

But even apart from that, fathers seem to have had the relevant sons rather late in life.

And Syncellus?

Abraham born 2188 BC - 160 = Jacob born 2028 BC.
David anointed 1083 BC + 30 = David born 1113 BC.

2028 - 1113 = 915 years
915 / 11 = 83 years per generation.

I think I prefer Roman Martyrology (or in this part Ussher)./HGL

* From Luke 3