- LOWE, WALTER BEZANT (1854 - 1928), antiquary
- LOYD, LEWIS (1767 - 1858), banker
- LOYD?, SAMUEL (1796 - 1883), banker - see LOYD, LEWIS
- LUCAS, RICHARD (1648 - 1715), cleric and author
- LUMLEY, RICHARD (1810 - 1884), Calvinistic Methodist minister
- LYNE, HORACE SAMPSON (1860 - 1949), president of the Welsh Rugby Union, 1906-1947
- LYNN-THOMAS, Sir JOHN (1861 - 1939), surgeon