James "Maffer" Davey (25 December 1880 – 21 October 1951) was a British rugby union player who competed in the Rugby event at the 1908 Summer Olympics.

He then spent some years working in the gold mines of the Witwatersrand, captaining Transvaal from 1904 to 1906.

[2] On his return to Cornwall he played twice on the losing side for England, once in 1908 against Scotland and once in 1909 against Wales.

"Maffer" was capped 35 times for Cornwall and was a member of the county's famous Championship winning side of 1908 when they beat Durham in the final 17–3 at Redruth.

He was a member of the rugby team that won the silver medal at the 1908 Summer Olympics when Cornwall represented Great Britain, losing to Australia in the final.