Question: Aurelia Plath was the grandmother of what biologist, who was the son of English poet Ted Hughes? 

Context articles: Otto Plath
Nicholas Hughes
Sylvia Plath
Assia Wevill
Crow (poetry)
The Bell Jar
Aurelia Plath
Tales from Ovid
Birthday Letters
The Hawk in the Rain

Otto Emil Plath (April 13, 1885 – November 5, 1940) was a German American author, a professor of biology and German at Boston University, and an entomologist, with a specific expertise on bees.
 He was the father of American poet Sylvia Plath, Warren Plath, and the husband of Aurelia Plath.
 He wrote the 1934 book, "Bumblebees and Their Ways".
 He is notable for being the probable subject of one of his daughter's most well-known poems, "Daddy".
Nicholas Farrar Hughes (January 17, 1962 – March 16, 2009) was a fisheries biologist known as an expert in stream salmonid ecology.
 Hughes was the son of the American poet Sylvia Plath and English poet Ted Hughes and the younger brother of artist and poet Frieda Hughes.
 He and his sister were well known to the public through the media when he was a small child, especially after the well-publicized suicide of his mother.
 Hughes held dual British/American citizenship.
Sylvia Plath ( ; October 27, 1932 – February 11, 1963) was an American poet, novelist, and short story writer.
 Born in Boston, she studied at Smith College and Newnham College at the University of Cambridge before receiving acclaim as a poet and writer.
 She married fellow poet Ted Hughes in 1956, and they lived together in the United States and then in England.
 They had two children, Frieda and Nicholas, before separating in 1962.
 Plath was clinically depressed for most of her adult life, and was treated multiple times with electroconvulsive therapy (ECT).
 She committed suicide in 1963.
Assia Wevill (15 May 1927 – 23 March 1969) was a German-born woman who escaped the Nazis at the beginning of World War II and emigrated to Mandate Palestine, then later the United Kingdom, where she had a relationship with the English poet Ted Hughes.
 She killed herself and her four-year-old daughter Alexandra Tatiana Elise (nicknamed "Shura") in a fashion similar to that of Sylvia Plath, well-known writer and Hughes's first wife, who six years earlier had also committed suicide, by use of a gas oven.
Crow: From the Life and Songs of the Crow is a literary work by poet Ted Hughes, first published in 1970 by Faber and Faber, and one of Hughes' most important works.
 Writing for the Ted Hughes Society journal in 2012, Neil Roberts, Emeritus Professor of English Literature at the University of Sheffield, said:
The Bell Jar is the only novel written by the American writer and poet Sylvia Plath.
 Originally published under the pseudonym "Victoria Lucas" in 1963, the novel is semi-autobiographical, with the names of places and people changed.
 The book is often regarded as a "roman à clef" since the protagonist's descent into mental illness parallels Plath's own experiences with what may have been clinical depression.
 Plath died by suicide a month after its first UK publication.
 The novel was published under Plath's name for the first time in 1967 and was not published in the United States until 1971, in accordance with the wishes of both Plath's husband, Ted Hughes, and her mother.
 The novel has been translated into nearly a dozen languages.
 The novel, though dark, is often read in high school English classes.
Aurelia Frances Plath (née Schober; April 26, 1906 – March 11, 1994) was the wife of Otto Emil Plath, the mother of the American poet Sylvia Plath, and her brother Warren, and the grandmother of Frieda Rebecca Hughes and Nicholas Farrar Hughes.
Tales from Ovid is a poetical work written by the English poet Ted Hughes (17 August 1930 – 28 October 1998).
 Published in 1997 by Faber and Faber, it is a retelling of twenty-four tales from Ovid's "Metamorphoses".
 It won the Whitbread Book Of The Year Award for 1997 and has been translated into several languages.
 It was one of his last published works along with "Birthday Letters".
 Four of the tales were previously published in "After Ovid, New Metamorphosis", edited by M. Hofmann and J. Ladun.
Birthday Letters, published in 1998, is a collection of poetry by English poet and children's writer Ted Hughes.
 Released only months before Hughes's death, the collection won multiple prestigious literary awards.
 This collection of eighty-eight poems is widely considered to be Hughes's most explicit response to the suicide of his estranged wife Sylvia Plath in 1963, and to their widely discussed, politicized and "explosive" marriage.
The Hawk in the Rain is a collection of poems by the British poet Ted Hughes.
 Published in 1957, it was Hughes's first book of poetry.
 The book received immediate acclaim in both England and America, where it won the Galbraith Prize.
 Many of the book's poems imagine the real and symbolic lives of animals, including a fox, a jaguar, and the eponymous hawk.
 Other poems focus on erotic relationships, and on stories of the First World War, Hughes's father being a survivor of Gallipoli.