Hi Agnes, I didn't find anything for Lenora/Lenore with her maiden or surname. Do you know the month she married in Cleveland? If yes, you might be able to get a copy of the marriage license which sometimes and sometimes does not include the parents' names.
I did find: Lenora Robinson Marriage Date: 1949-1950 Source: Cuyahoga County, Ohio Marriage Records and Indexes 1810-1973.
The 1940 Census will be issued to the public next month and hopefully indexed by the end of the year. You should be able to find her and her parents on that index.