Authorised form of nameSamuda; Isaac de Sequeira (c.1681 - 1729)
Other forms of nameSequeira Samuda, Isaac de; de Sequeyra Samuda, Isaac; Samuda, Simão Lopes
ForenamesIsaac de Sequeira
Datesc.1681 - 1729
Dates and placesBaptism:
Church of Sao Juliiao, Lisbon, Portugal, Europe (c.1681)
Parish of St Botolph without Bishopsgate, London, England, United Kingdom (20 November 1729)
Portuguese Jews' old cemetery at Mile End Road, Stepney, London, England, United Kingdom
Research Field:
Medicine, astronomy
Coimbra University, MB (1702)
Practised as a physician in London. Admitted to Royal College of Physicians on 19 March 1721. Physician to the Portuguese envoy extraordinaire (later Ambassador) in London, Antonio Galvao de Castelo-Branco (from 1724). Retained connections with an international network of Portuguese Jesuits whilst in London and acted as a conduit of information between them and the Royal Society, including sharing of astronomical observations.
LRCP (1721)
Royal Society activityMembership:
Election Date:
RelationshipsSecond son of Rodrigo de Sequeira, merchant, and his wife, Violante Nunes Rosa, who were both of Jewish origin. Baptised with the same name as his grandfather Simão Lopes Samuda, a physician from Odemira.
Published works
General contextSamuda was the first Fellow of Jewish heritage to be elected to the Royal Society. Arrested on 23 August 1703 during the Portuguese Inquisition, tortured and convicted de vehemente of Judaizing, at an auto da fé held in Lisbon on 19 October 1704 after which he fled to London with other members of his family. Changed his name to Ishac de Sequeira Samuda at the Spanish and Portuguese Synagogue in London in 1709.
Bulloch's Roll; Munk's Roll; DNB
London Magazine 1743, p205 (obituary)
Subscription paid to Michaelmas 1727 (paid 9 Nov 1727) - nothing recorded thereafter. On PL until 1729, not thereafter. Signed Bond no 198, 24 Oct 1723. Name disappeared from RCP list "in 1731" (Munk).
Casrla Costa Vieira, 'Observing the skies of Lisbon. Isaac de Sequeira Samuda, an 'Estrangeirado' in the Royal Society ' in NR 2014, vol 68, no 2, pp 135-149
Virtual International Authority File
Royal Society codeNA5339
Archives associated with this Fellow
Reference numberTitleDate
EL/C2/84Translation of part of a letter of Joseph Israel Carrillo, physician to the King of Tunis, to Isaac de Sequeira Samuda1728
EL/C2/83Joseph Israel Carrillo, physician to the King of Tunis, to Isaac de Sequeira Samuda25 August 1728
EL/C2/62Astronomical observations by John Baptista Carbone, dated at Lisbon, to Isaac de Sequeira Samuda1727
RBO/12/36Anatomical observations from Antonio Monrava communicated by Isaac de Sequeira Samuda1724
RBO/14/118'An account of an uncommon Phaenomenon of the Verbascum in flower being part of a Letter from Jos Israel Carrillo Physician to the King of Tunis to Isaac de Sequeira Samuda'1730
RBO/13/35Astronomical observations from John Baptista Carbone transmitted by Isaac de Sequeira Samuda1728
CLP/5/34Paper, weather observations from Lisbon for October to December 1724 by Isaac Sequeira Samuda1725
MS/390/199Bond of Isaac de Segueira Samuda to the Treasurer of the Royal Society24 October 1723
CLP/15i/73Description of a large fish seen off the coast of Lisbon sent by Samuda21 January 1723
EL/C2/61Astronomical observations by John Baptista Carbone, dated at Lisbon, to Isaac de Sequeira Samuda1726
RBO/12/23Concerning the differences in the meridian of Paris, London and Lisbon sent by John Baptiste Carbone to Isaac Samuda1725
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