Is long life hereditary?

As of TODAY (11 FEB 2019) I am 76.  May 25 of this year will make it 77.

My dad went at 70, but THAT was from complications after surgery.  HIS dad made it to 76.

Mom went at 88.  So, it would appear that the Binkley (Dad) and Williams (Mom) families have a fair amount of "long life" genes among them.

At THIS point, you may be wondering, "WHERE the HELL does "Gordon" come into the picture?"  Well, Gordon used to be my middle name (chosen by Dad in honor of a friend), until I went to court and had the family name lopped off.  I DID re-unite with the family later, but STAYED with the changed name.  ("What family doesn't have its ups and downs?"  ~Katherine Hepburn as Eleanor of Aquitaine in "The Lion in Winter")

Obviously, mortality has been on my mind lately.  I could GO before I finish this, OR, I may have another DECADE left.  Equally obvious:  improvements in medicine and medical care have to be factored in.

MOST likely CAUSE of demise ...
1) Accident.  I am weak and fragile, and have difficulty with even walking.  In my current condition, a FALL could be LETHAL, depending on HOW and ON WHAT I land.

2) Heart failure or stroke.  I have a blood pressure problem;  had it off and on for AGES.  Being treated for it, but the financial pressures I'm under sure don't HELP any.

Mostly just rambling (and sharing) here.  If there's a POINT to this;  it eludes me. 
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