John Frederick FitzGerald-de Ros British Royal Navy officer (1804-1861) (1804–1861) Parents Charlotte FitzGerald-de Ros, 20th Baroness de Ros Lord Henry FitzGerald Children Siblings Olivia FitzGerald-de Ros Jane FitzGerald-de Ros Cecilia FitzGerald-de Ros Frederick March Geraldine FitzGerald-de Ros Henry FitzGerald-de Ros, 21st Baron de Ros William FitzGerald-de Ros, 22nd Baron de Ros