John FitzGerald, 1st Baron Desmond Irish founder of the Desmond line of the FitzGerald dynasty (d. 1261) Parents Ellinor de Marisec Thomas FitzMaurice FitzGerald Children Sir Maurice Buidhe fitz John, 1st Knight of Kerry Olyvia fitz John Sir John fitz John, 1st Knight of Glin Thomas fitz John Sir Gilbert fitz John Philip fitz John Maurice FitzJohn FitzGerald Siblings Maurice fitz Thomas Partners Honora O'Connor Margery fitz Thomas