After seeing the message from the other lady, I went back and searched again for yours. I didn't find any death information on the parents.
A Gertrude Coghlan of King Co. married William D. Robinson of King Co on 15 June 1940 at St. James Cathedral, Seattle, King Co. Witnesses=Michael J. Coghlan & Mary Coghlan. Source: Washington State Digital Archives (WSDA). You can view & print all marriage records at the web site for no charge.
A William D. Robinson, Jr. b. abt. 1942 died 14 March 1945, Seattle, King Co., WA.
Age=3 yrs 8 mos 17 days.
Father=William D. Robinson.
Mother=Gertrude Coghlan. Source: Washington Death Certificates 1907-1960, Family Search, fsbeta.familysearch.org.
A Mary Doghlan of King Co. married a James Davis of King Co. 4 April 1942 at the County-City Building, Seattle. Witnesses=Richard Davis & William D. Robinson. Source: WSDA.
A James C. Coghlan of King Co., married Helen O'Connor of King Co on 21 April 1951 at Blessed Sacrament Church. Witnesses=Owen W. Durkin & Elaine Stiller. Source: WSDA.
A James Co Coughlan b. June 2, 1920 died Jan. 30, 1989, Seattle, King Co., WA. Source: WSDA, Social Security Death Index.
You can verify that this was your James by requesting a copy of his obituary from Washington State Library, sos.wa.gov/library/Genealogy.aspx .
A Michael J. Coghlan b. July 1, 1911 died April 3, 1989, Orting, WA. Source: same as above.
Don't forget to request a copy of his obituary too.
A William A. Doughlan b. Oct. 2, 1915, Last Residence Zip=98116 died Nov. 29, 1998, Seattle. Source: WSDA, Social Security Death Index. Successful Searching!