Joaquim Lobo da Silveira, 7th Count of Oriola
Joaquim Lobo da Silveira, 7th Count of Oriola (1772–1846) was a Portuguese plenipotentiary at the Congress of Vienna in 1815.  While at the Congress he signed a number of treaties and documents on behalf of Prince-Regent John of Portugal including the Declaration of the Powers, on the Abolition of the Slave Trade, on 8 February 1815.
Later he acquired land in Prussia and settled there becoming a naturalised citizen of Prussia. The King of Prussia granted him the title of graf (the German equivalent to his Portuguese title of conde (count)).
- (Portuguese) Bonifácio, Maria de Fátima (2011), Memórias do Duque de Palmela, Leya, p. 114 footnote 119, ISBN 9789722045056
- Hansard, T.C (1 February to 6 March 1816), The Parliamentary Debates from the Year 1803 to the Present Time … 32, T.C. Hansard, pp. 200–201 Check date values in:
- Jacob van der Merck (c.1610 - 1664), The Weiss Gallery, 2012, retrieved December 2012 "His Portuguese grandfather, Joaquin Jose Lobo da Silveira (1772 – 1846)... [whose] son was Eduardo Ernesto Lobo da Silveira, Graf von Oriola (1809 – 1862) [de]"
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