Darwin's own grandfather, Erasmus Darwin, had written on evolution.

达尔文自己的祖父伊拉姆斯•达尔文，就已经写到了进化论。

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And the idea crops up again in the works of Thomas Hobbes, a 17th-century philosopher, and Erasmus Darwin (Charles's grandfather), who lived in the 18th.

这一观点也在17世纪哲学家托马斯·霍布斯和18世纪的伊拉斯谟·达尔文(查尔斯·达尔文的爷爷)的著作中有所体现。

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In the late eighteenth century, Darwin's grandfather, Erasmus Darwin,suggested that species evolved from their ancestors.

VOA: special.2009.12.01

His own grandfather,Erasmus Darwin, believed that species evolved.

VOA: special.2009.02.25

An example: 1790's Zoonomia, by Erasmus Darwin (Charles' grandfather), whose observations prefigure the concept of evolution.

FORBES: Magazine Article

There was Erasmus Darwin, an enormously fat doctor, Matthew Boulton, a pushy metal-goods manufacturer, and Josiah Wedgwood, the man who turned fine pottery into a commercial goldmine.

ECONOMIST: 18th-century science

She recorded her debt to the daring speculations of Erasmus Darwin, Charles's grandfather, about the spontaneous creation of life, and to the electrical researches of Aldini's uncle Luigi Galvani.

WSJ: Book Review: The Lady and Her Monsters