OK, this has at least one instance of each letter in uppercase and lowercase.
Alec Beverly Caleb David Egbert Fred Gordon Howard
Imogene Jasper Katja Lyle Monique Nigel Ozwald
Philip Quentin Rex Svenja Tiffany Udo Viggo
William Xander Yeardley Zeke
Now I just need Icelandic names starting with and containing Eth and Thorn, and one German first name containing eszet, and I'll have a finished list. Anyone here know Icelandic?