Ekaterina (Katya) Desnitskaya or known among Siamese as Mom (= Title given to a prince’s common wife) Catherine Na Pitsanulok, the wife of Prince Chakrabongse Bhuvanath who was King Rama VI’s biological brother.
In this computer colored photo, she is seen wearing traditional costume and lovingly holding Prince Chula Chakrapong, their only son (His story can be read on page 16/376).