McConnell, William (1831–67) ODNB
Mackay, Wallis (1852–1907) WBI
Manton, Gildon ( fl. 1829) NPG
May, Walter William (1830–96) WBI
Meason, W W ( fl. 1879) BP1/1/3/2
Meyer, Henri ( fl.1879) BP1/2/38/2
Meyerheim, Paul Friedrich (1842–1915) WBI