When was john logie biards siblings date of birth and death?

John Logie Baird had two siblings: his brother, James, born in 1886, and his sister, Gwendoline, born in 1890. James Baird passed away in 1946, while Gwendoline's date of death is not widely documented. Specific details about their lives are less known compared to John Logie Baird's contributions to television and technology.