*James Gamble, co-founder of Procter & Gamble<ref>http://famousbrandnames.blogspot.com/2007/02/procter-gamble.html</ref>
*James Gamble, co-founder of Procter & Gamble<ref>http://famousbrandnames.blogspot.com/2007/02/procter-gamble.html</ref>
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*Sir [[Nigel Gresley]], one of the greatest steam locomotive designers
*[[William Hamilton]], the greatest-ever Irish mathematician and biggest contributor of mathematics to physics since Isaac Newton, raised by his uncle the Reverend James Hamilton.
*[[William Hamilton]], the greatest-ever Irish mathematician and biggest contributor of mathematics to physics since Isaac Newton, raised by his uncle the Reverend James Hamilton.
*Captain [[William Kidd]], pirate, hanged 1701, was the son of a [[Greenock]] minister.
*Captain [[William Kidd]], pirate, hanged 1701, was the son of a [[Greenock]] minister.