Hilda Davies <-> Sadia Dehlvi
Hilton Young <-> Tony Holguin
Hilary Corke <-> Karoly Reich
I don't know who these people are, but this could be a way to uncover anagrammed pen names wholesale.
By my method, the top scorer is ACEEEFFGHHIILLMMNNOORRSSSTUV (25 points), which is the pseudonym of 17th-century German writer Hans Jakob Christoffel von Grimmelshausen. See if you can guess where he got his pseudonym.
After this there are a large number of high scorers, some very interesting, some less so. I think my current favorite is “Atlantis Casino Resort Spa” / “Carter assassination plot” (18 points) but it might be “Sunrise celebration” / “lesbian intercourse” (16).
The score file includes 1,657,148 (!) anagram pairs of which 26,296 have a score of 10 or higher and 475 have a score of 15 or higher.