Central Burying Ground, those types of images were common, and they're one of my favorite icons. This is a slightly different interpretation here.
This last image, I unfortunately don't have the name for. It's a coat of arms sculpted into one side of a headstone. These have their own symbolism, not something I have any expertise in but it's interesting to consider some of the symbols used here and what they may have meant to the person this belonged to. It's certainly something different, especially to me. You don't see gravestones like this anywhere in the Midwest, so it's unique to certain areas of the U.S. like Boston.
Death's Head, Cherub, Urn and Willow via Plymouth Colony Archive Project
On the Hon. Simon Harcourt via Bartleby.com
Symbols on Coats of Arms and Family Crests via Oshel.com