John Leech - mathematician - was born in 1926.
John Leech - mathematician - died in 1992.
John Henry Leech was born in 1862.
William John Leech was born in 1881.
John Hind - mathematician - was born in 1796.
John Greig - mathematician - was born in 1759.
John Collins - mathematician - was born in 1625.
John Baines - mathematician - was born in 1787.
John Hudson - mathematician - was born in 1773.
John Craig - mathematician - was born in 1663.
John Casey - mathematician - was born in 1820.
John Crossley - mathematician - was born in 1937.
John Hinch - mathematician - was born on 1947-03-04.