This very much correlates with what you see when you visit old graveyards. You will see a family plot where numerous children dies very young, 2 months to 5 years of age. Then you’ll see members of the same family who lived into their 80s and 90s.
I would bet that only well off families could afford good food and a stone marker that would last 150 years. Poorer families living on less probably had wood markers.
And multiple wives because of childbirth deaths.