Must be the same chap enumerated twice, mustn't it, Deb?
On a slightly different point, I think I have identified a child of Louise Osbaldeston VESLY, namely an Alexandra DE VESELY. Alexandra seems to have married a Herbert Potter BEARCE, and in 1937 they announced the birth of a son in the New York Times. The child is described in the birth announcement as a "great-grandson of the late
Lord Edwin Osbaldeston, surgeon to Queen Victoria".

. (It also describes Alexandra as "the former Miss Alexandra de Vesely of Vienna" - not clear whether this is Vienna, N.Y. or the Austrian Vienna).
Googling the child's name (I won't post it in case he is still living) suggests that he was one of three children born to the couple, and that he became a US congressman...
ETA The New York Times for 6 Feb 1935 carries a piece about a secret wedding between Herbert Potter BEARCE and Alexandra DE VESELY*, in which (from the fragment I can see) she appears to be described as "the daughter of the late Count de Vesely of Czechoslovakia, who was killed while leading his regiment on the Italian front during the World War"

.
*Alexandra's name in the marriage announcement might in fact be given as DE VESELY DURING, but I can't tell whether the DURING bit is really her name or a glitch with the extract I'm allowed to see. I tried to pay the $3.50 to see the article in full, but the NYT website will not allow "United Kingdom" as a valid "country" so has rejected my efforts to pay them money
