Sybil Pleydell-Bouverie (1878-1946) (1878–1946) Parents Walter Pleydell-Bouverie Mary Bridgeman-Simpson Children Bryan Edward Wingfield Mervyn Patrick Wingfield, 9th Viscount Powerscourt Doreen Julia Wingfield Siblings unknown Pleydell-Bouverie Nancy Pleydell-Bouverie Mary Pleydell-Bouverie Elizabeth Pleydell-Bouverie Mildred Alice Pleydell-Bouverie Humphrey Pleydell-Bouverie Partners Mervyn Wingfield, 8th Viscount Powerscourt