Hello there!
I don't suppose you have a copy of Neil Walklate's article on William Thomas? I've got as far back as William's parents and 4 (?) siblings

In terms of the line your following, I may be able to help a tiny bit:
Owen's son Robert Evan Thomas b1880 Mass. (tracked up until 1930)
Florence R. Hurlburt b around Dec 1880 in Nova Scotia to George (b 1852)& Anna Hurlburt (b 1854)
Gordon Evan Thomas b 13/3/1906 Los Angeles, California
d 15/9/1984 Natick, Middlesex, Massachusetts, USA
m Marjorie Elizabeth Gower (date currently unconfirmed)
b 1907 in Leicester, Worcester, Massachusetts, United States
d 1990 in Holden, Worcester, Massachusetts, United States
They have a surviving son, grand-daughter, and great-grandson.