Who married Tatiana von Plön?

Nikolai Eltchaninov married Tatiana von Plön on January 15, 1930. Tatiana von Plön was 21 years old on the wedding day (21 years, 2 months and 2 days). Nikolai Eltchaninov was 23 years old on the wedding day (23 years, 10 months and 28 days). The age gap was 2 years, 8 months and 26 days.