I realize it has been a few years since you posted this request.
Clair Johnson was married to my Mother, Lorraine Anderson. I know I have more info packed away, I believe I also have a marriage certificate, but not quite sure where it is being stored.
I do have in my possession his Purple Heart certificate and the "In Grateful Memory of..." certificate as well. I wear his wedding band on my thumb, to remind me. mostly of my Mother, who passed in 1984, but also as a reminder of the strong bond they have...and the incredible sacrifice he made.
I have pictures of them in Downey CA (my Mother had recently graduated from High School), I believe they lived there when he left for the War. They never had any children, but my Mother loved him dearly and never a day went by that she didn't miss him.
I have been in touch with the granddaughter of Clair's brother, Evan, and exchanged information before Evan passed away, he was very happy to have received some letters and pictures I sent to him. According to her (Monica Christiansen) the only surviving sibling is Earlene, who suffers from Alzheimer's or severe dementia.
I hope this has been of some use to you, and please contact me if you have any other question, if I come across the marriage cert. I will scan it and pass it on to you.
Thank you, Sincerely,
I have just recently been in touch with firstname.lastname@example.org
to share info with her.
I hope this helps, somewhate