Tolkien the Matricide

[Voralphion]

I think that Frodo having a dead mother was a necessary element because if his mother was alive he probably would never have become Bilbo's heir as he was adopted (sort of) by Bilbo because Frodo's parents died.

From the original post

Frodo - dead mom.
Sam - dead mom.
Boromir - dead mom.
Aragorn - dead mom AND dead foster mom.
Éomer and Éowyn - Ditto
Legolas - J.R.R. "forgets" to give him one.
Gimli - Eh, he's a dwarf. Who knows?
Treebeard - Mom missing, presumed dead.
Pippin and Merry - No dates given, but what do you THINK?

Who is Aragorn's dead foster mom? Since his foster father was Elrond I would guess Celebrian was meant, but she had passed over the sea by the time Aragorn was born, and anyway she didn't die.
Also Treebeard didn't have a mom unless it was Yavanna since Treebeard was one of the original ents.