Richard Chenevix Trench,
English Past and Present
“ If ‘life-guard’ was originally, as Richardson suggests, ‘leib-garde’, or ‘body-guard’, and from that transformed, by the determination of Englishmen to make it significant in English, into ‘life-guard’, or guard defending the life of the sovereign, this will be another word from the same quarter. Yet I have my doubts; ‘leibgarde’ would scarcely have found its way hither before the accession of the House of Hanover, or at any rate before the arrival of Dutch William with his memorable guards; while ‘lifeguard’, in its present shape, is certainly an older word in the language ”
