William Jason Maxwell Borthwick Royal Navy officer (1910-1998) (1910–1998) Parents William Borthwick Ruth Margery Rigby Children Alister Jason Borthwick Josephine Cleveland Borthwick Rosalind Cleveland Borthwick Celia Cleveland Borthwick Siblings Brian Thomas Borthwick Margaret Ruth Borthwick Elinor Valerie Borthwick Partners Elizabeth Cleveland Elworthy
