Rịba ama amaokwu a dị n'okpuru ma zaa ajụjụ ahụ mgbe e mesịrị n'otu asụsụ ahụ dị ka amaokwu ahụ:  Henry Cavendish amụrụ na 10 Ọktọba 1731 na Nice, ebe ezinụlọ ya bi n'oge ahụ. Nne ya bụ Lady Anne de Grey, nwa nwanyị nke anọ nke Henry Grey, 1st Duke nke Kent, na nna ya bụ Lord Charles Cavendish, nwa nwoke nke atọ nke William Cavendish, 2nd Duke nke Devonshire. Ezinụlọ ahụ gbasoro usoro ọmụmụ ya n'ime narị afọ asatọ ruo n'oge Norman, ma jikọọ ya na ọtụtụ ezinụlọ ndị aristocratic nke Great Britain. Nne Henry nwụrụ n'afọ 1733, ọnwa atọ ka a mụsịrị nwa ya nwoke nke abụọ, Frederick, na obere oge tupu ụbọchị ọmụmụ nke abụọ nke Henry, na-ahapụ Lord Charles Cavendish ka ọ zụlite ụmụ ya nwoke abụọ. Cavendish bụ ụdị dị ka "The Honourable Henry Cavendish". Site na afọ 11 Henry gara Newcome's School, ụlọ akwụkwọ onwe ya dị nso na London. Mgbe ọ dị afọ iri na asatọ (na 24 Nọvemba 1748) ọ banyere Mahadum Cambridge na St Peter's College, nke a maara ugbu a dị ka Peterhouse, mana ọ hapụrụ afọ atọ ka e mesịrị na 23 Febụwarị 1751 na-enweghị ogo (n'oge ahụ, omume a na-ahụkarị). Mgbe ahụ, ya na nna ya biri na London, bụ́ ebe o mechara nwee ụlọ nyocha nke ya.  Ajụjụ: N'afọ dị aṅaa ka Henry gara Mahadum Cambridge?
Afọ 1748