Believe it or not, it's called a "lowering device"
Another name for it is a casket. It is a box where people are put after they die. The casket is then lowered into the ground, and covered in dirt. People usually then put a grave stone on top, with the person's name engraved in it.
The name for a stone over a grave site is called a headstone as well as a marker. They are usually chiseled with the deceased person's name, birth date, death date, and sometimes pictures and quotations.
a pall (or casket pall / funeral pall)
a casket
Aleksandr Grave's birth name is Grave, Aleksandr Konstantinovich.
Vladimir Grave's birth name is Vladimir Ivanovich Grave.
casket
There are too many parts to list them here. A complete list can be found by searching the Internet for: casket nomenclature and / or: casket components
a blocked funnel.
Pallbearers. They can be women also.
No one who wants their name on here....
It is called a casket spray, a floral arrangement on a coffin for a funeral. Some sources believe that the white lily was the flower of choice for this casket, arranged in the shape of a cross, and surrounded by a field of green ferns.