Technically speaking, my grandfather and great-grandfather's collection doesn't end as it lives on through mine. But for clarity, I'd like to include an entry on which chunk of the overall collection comes from whom. Dates are estimated off of when they passed, overlap occurs as I have multiples of coins graded, yet some multiples are hard to attribute to a specific relative because I was not able to retrieve such information. 

Pre 1955 coinage to 1980: Great Grandfather.

1980 to 2015- Grandfather (except for a few silver eagles)

2004-now: Me