This photo was taken at the wedding of Arnold Vinakmen to Valentina Fedorova in Daugavpils, Latvia November 1, 1936.
Also in this picture are Janis Vinakmens, 4th person from the left, in a military-like jacket. The mother of the bride is standing behind the bride and groom, directly in between them. Karlis Vinakmens might be the young man standing beside her.
This is speculation, but likely Arnolds’ mother was there. Is Emilija Karline Veisbergs the woman standing beside the bride’s mother?
The man standing beside the young man who could be Karlis Vinakmens looks (to me) suspiciously like Karlis in his later years. Vilis Wihnstein??
Beautiful old photo!