With the result that everyone who has my surname can all be traced back to a single immigrant ancestor, and the geographical distribution of the name still largely reflects where his sons settled after the Revolutionary War.

Thanks!

only about 120 of us living

although I am not really sure since I visited my Grandfather's and Great-Grandparent's graves a few months ago and there is some dispute about the spelling of the name… my Great Grandfather (on my Dad's side) came over from Denmark and somewhere between him and my Grandfather getting out of the Army there is an I added

Thanks!

Approximately 14 people bear this surname

I'm going to share this with my mom.

My last name is around the 45,000th most common, so it's not really common but not rare.

My wife's last name is the 110th most common name in the world. Then again, she is Korean. If you went into a crowded room and yelled the last name you'd probably have quite a few people looking at you.

... cast a stone down into the valley below, you would hit a Kim, a Park, or a Lee.

My wife is one of those three.

It's the 1,167th most common.

apparently Warburton and Zappa are both uncommon.

ETA (just for irony):

Dirt Surname Meaning & Statistics
6,300,947th most common surname in the world
Approximately 1 people bear this surname
Most prevalent in:Indonesia
Highest density in:Indonesia

The meaning of this surname is not known.

So they took their Grandfather's name, added the patronymic and ditched the "s". Everyone with the same spelling of my last name is related.