Dear Ms. Dlouhy,
Thank you for posting your request on History Hub!
We suggest you begin by researching his service as a police officer in Cleveland. The Cleveland Division of Police may be able to provide you with more information. The state of Ohio does not maintain marriage records. They can only be requested through the county in which the marriage occurred. If the marriage was performed in Cleveland, Cuyahoga County, Ohio, you may submit a request here.
We hope this is helpful! Best of luck with your family research!
Do you have any idea when he was born and if it was in Cleveland?
The below page is from familysearch.org. You need an account but it is free. There is a Frank Dlouhy in Cleveland who was born in 1905. If your relative was born around then and in Cleveland, it could be him. There is birth information and census information on this page too. I hope this helps.
Yes he was born in 1905. I will check that out. Thank you.