I have found a William Normoyle arriving New York from Southhampton on April 7, 1919 aboard the Mauretania. He is 34, married, foreman, born Australia, Irish, last permanent residence was Oregon, final destination Portland, Oregon, passage was paid by the British Government, had been in US before March 2, 1918, Halifax is stroked out and Oreg written in, is destined to Mrs. Normoyle, 497 N. 21st St., Portland, Oregon.
This is likely the William on the 1920 US Census, age matches which means a birth year of approx 1885--5 years out from your William, b 1890.
Just reading back through the thread, I see that you had the death info for Ruby's parents. Sorry to have included it again.
Think it's time I went to bed.
Susan