https://www.dateas.com/es/obituario/gibson-roy-herbert-837088
Roy Herbert Gibson q.e.p.d., falleció el 19-11-2018. - Su mujer Odette Even; sus hijos Valeria y Santiago Pinto Escalier, Martín y Malen Gerding, y sus nietos Marcos, Agustín, Maggie y Olivia, Juana, Inés y Tomás participan con dolor su fallecimiento.
which I believe translates as:
Roy Herbert Gibson q.e.p.d., died on 19-11-2018. - His wife Odette Even; his children Valeria and Santiago Pinto Escalier, Martín and Malen Gerding, and his grandchildren Marcos, Agustín, Maggie and Olivia, Juana, Inés and Tomás participate in their death with pain.
He was the son of Gerald Herbert GIBSON (1902 - 1951), 3rd son of Sir Herbert GIBSON, 1st Baronet, and Ursula Marion WILSON (died 1972).
He m 1970 (Georgina) Odette EVEN, and had issue: Valerie (Valeria) and Martin. Two grandchildren: Mark (Marcos), Agustin are known to Debrett's, with other grandchildren not known.