I don't think any record keeping is kept of deaths of Jehovah's Witnesses so I would say unknown.
If you're talking about Germany... Jehovahs Witnesses refused the nazi-salute and the military service (according to their religious belief). Therefore they were sent to concentration camps (where some of them died).
No, according to the publication "Jehovah's Witnesses Porclaimers of God's kingdom" pub. 1993 p. 200:"For years, Bible Students wore a cross and crown as a badge of identification, and this symbol was on the front cover of the "Watch Tower" from 1891 to 1931. But in 1928 it was emphasized that not a decorative symbol but one's activity as a witness showed he was a Christian. In 1936 it was pointed out that the evidence indicates that Christ died on a stake, not a two-beamed cross."
she died on April 14, 1935.she died on April 14, 1935.
Witnesses
Amy Dillwyn died in 1935.
He Fenglin died in 1935.
Dranem died in 1935.
in 1935 until he died
Zhengqiu Zheng died on July 16, 1935, in Shanghai, China.
Emmy Noether died on the 14th of April 1935.
She died in 1935.
Harold Van Buren Magonigle died on January 26, 1935.