I was hoping that you might be able to get her obit and it would tell you more about Ellis Allen and maybe her maiden name. There is no free site that will answer the question of her marriage. I tried to look for a marriage for her, but so far I haven't found one, searching through The Oregonian search index.
I will look a little further and see what I can find.
There is this in the Oregon Death Index: Name: Allen, Ellis Miller County: Multnomah Death Date: 4 Feb 1989 Certificate: 89-02200 Age: 67 Birth Date: 12 Dec 1921 Spouse: Ann
Name: Ellis M. Allen Date of Birth: MondayDecember12, 1921 Date of Death: SaturdayFebruary04, 1989 Est. Age at death: 67 years, 1 months, 23 days Last known residence: City:Portland County:Multnomah State:Oregon ZIP Code:97202 Latitude:45.4818 Longitude:-122.6402
Social Security details: State of Issue:Oregon Number:543-38-1341
There is no online obit for Ellis Allen.
Let me know how you come with Effie's obit. Eellitta firstname.lastname@example.org