You can knock Wikipedia all you like, but I discovered some truly interesting information about the descendants of J.R.R. Tolkein, just by doing a bit of research on the Mabinogion.

To wit:

• Christopher Tolkein deserves all the credit in the world for the existence of The Silmarillion. It was he who edited his father’s chaotic papers and drafts into the grand manuscript of the First Age. Plus, Christopher was actually part of the Inklings, the club of scholars and writers who included C.S. Lewis. J.R.R. called Christopher “his chief critic and collaborator”. He also drew many of the original maps of Middle Earth.
• Simon Tolkein, Christopher’s son, is a novelist in his own right, and publicly broke with his father over the reaction of the Tolkein estate to Peter Jackson’s films. There was rumor that Christopher even disowned Simon over it, but they have supposedly since reconciled. His most recent novel, set during WWI and published coincident to the Battle of the Somme, is at least a partial homage to his grandfather’s experience in that battle.
• Nicholas Tolkein, Simon’s son, is a playwright and director in Los Angeles. His first play premiered this past summer.

Quite the lineage, if you ask me.