In the Age of Sail, westernmost points in general were always critical because the prevailing winds are westerlies so these places are ‘lee shores’, coastlines upon which ships can easily get blown and shipwrecked. Sailors habitually put a Ho! into shouts of warning, as in ‘Land Ho!’ so that ‘Lee Ho!’ becomes part of the ancient sailors’ lexicon.
‘Lee Ho!’ names crop up wherever there are important lee-shores. For example, all three of Europe’s western ‘land ends’ confirm this:
Cape Finisterre (= end of land), the westernmost point of Spain, is in the kingdom of Leon
Cape Finistère, the westernmost point of France, is in the county of Léon
Land’s End in England was once part of the now drowned land of Lyonnesse.