John Duncan - botanist - was born in 1794.
John Duncan - botanist - died in 1881.
John Martyn - botanist - was born in 1699.
John Miers - botanist - was born in 1789.
John Horne - botanist - was born in 1835.
John Forbes - botanist - was born in 1799.
John Stackhouse - botanist - was born in 1742.
John Gillies - botanist - was born in 1792.
John Fraser - botanist - was born in 1750.
John Duncan Mackie was born in 1887.
John Alton Duncan was born in 1932.
John Holt Duncan was born in 1820.
John Duncan Gregory was born in 1878.