In 1938 I think she went by Queen Mother or Queen Mary, since there was also a Queen (Elizabeth), and not Queen Dowager. Didn't Alexandra also go by Queen Mother?
: This painting is listed on www.croatia.org : but says the sitter is the Queen Mother – : which clearly is wrong. Whether this is just : a clumsy translation or a typo I don’t l : know. In 1938 [when the painting was : painted] Queen Mary was the mother of the : King, so the confusion may lie there, and is : lost in translation, rather than through : ignorance.