Sancho I, nicknamed "the Populator" (Portuguese: "o Povoador"), King of Portugal, was the second but only surviving legitimate son and fifth child of Afonso I of Portugal by his wife, Maud of Savoy. Sancho succeeded his father and was crowned in Coimbra when he was 31 years old on 9 December 1185. He used the title King of Silves from 1189 until he lost the territory to Almohad control in 1191.
With the death of Afonso I in 1185, Sancho I became the second king of Portugal. Coimbra was the centre of his kingdom; Sancho terminated the exhausting and generally pointless wars against his neighbours for control of the Galician borderlands. Instead, he turned all his attentions to the south, towards the Moorish small kingdoms (called taifas) that still thrived. With Crusader help he took Silves in 1188. Silves was an important city of the South, an administrative and commercial town with population estimates around 20,000 people. Sancho ordered the fortification of the city and built a castle which is today an important monument of Portuguese heritage. However, military attention soon had to be turned again to the North, where León and Castile threatened again the Portuguese borders. Silves was again lost to the Moors in 1191.
King Sancho had 19 children, eleven with his wife Princess Dulicia of Aragon:
i. Princess Teresa de Portugal, b. 1176, d. in the Convent of Lorvano 18 Jun 1250Barcelos, p. 30.</ref>
ii. Princess Sancha de Portugal, b. 1178, d. 13 Mar 1229 in the Convent of Lorvano
iii. Princess Costancha de Portugal, b. in Coimbra in May 1182, d. 3 Aug 1202 in the Convent of Lorvano
iv. Prince Alfonso de Portugal, b. 23 Apr 1185 in Coimbra, d. 25 Mar 1223 in Coimbra, succeeded his father as King of Portugal.
v. Prince Raimundo de Portugal, b. 1186 or 1189, d. 9 Mar 1188 or before in Coimbra<
vi. Prince Pedro de Portugal, b. 23 Feb 1187 in Coimbra, d. 2 Jun 1258 in Mallorca
vii. Prince Fernando de Portugal, b. 24 Mar 1188 in Noyon, d. 4 Mar or 26 Jul 1233 in bur Marquette near Lille
viii. Prince Henrique de Portugal, b. aft. 1189, d. Dec 1189 of later
ix. Princess Mafalda de Portugal, b. 1 May 1256 in Amarente, Rio Tinto, burried in the Cistercian convent of Arouca
x. Princess Branca de Portugal, b. 17 Nov 1240 in Guadalajara, burried in the Church of the Holy Cross in Coimbra
xi. Princess Berengaria de Portugal, b. 27 Mar 1221 in Ringsted, burried in Ringsted Church
Two children with his first mistress Dona Maria Ayres de Fornelos:
And six by his second mistress Dona Maria Paez de Ribera:
xiv. Nunho Sanches de Portugal, d. 16 Dec 1212 or after, burried in Holy Cross Coimbra
xv. Gil Sanches de Portugal, d. 1236 in Coimbra
xvi. Rodrigo Sanches de Portugal, killed in battle near Oporto in 1245, burried in the Monastery of Grijo
xvii. Teresa Sanches de Portugal, b. between 1190 and 1200, d. 1230
xviii. Constancha de Portugal (no Sanches?), b. 1204, d. 8 Aug 1269 in Santa Cruz Coimbra
xix. Mayor Sanches de Portugal, d. 27 Aug ---- in Santa Cruz Coimbra, burried Santa Cruz Coimbra
With, his mistress, Maria Aires de Fornelos, daughter of Aires Nunes de Fornelos and Maior Pais, who was buried at the Monastery of Santo Tirso in accordance with her last will, Sancho had two children, both born before his marriage to Dulce of Aragon. These two are: Martin (Martinho) Sanches (born before 1175 (Count of Trastámara. Martin married Elo Pérez de Castro, daughter of Pedro Fernández de Castro, with no issue from this marriage; and Urraca Sanches (born before 1175),was married to Lourenço Soares, son of Soeiro Venegas and Sancha Bermúdez de Traba.
Barcelos, Pedro. Tit. VII, Reyes de Portugal. As cited at: "Portugal Kings," Foundation for Medieval Genealogy. Accessed 23 September 2019 by SJ Baty.
Sousa (1739) Provas. As cited at: "Portugal Kings," Foundation for Medieval Genealogy. Accessed 23 September 2019 by SJ Baty.
Álvarez Palenzuela, Vicente Ángel (2013). "El componente cruzado de la Reconquista". Mundos medievales: espacios, sociedades y poder (in Spanish). Universidad de Cantabria. pp. 59–70. ISBN 8481026506.
Caetano de Souza, Antonio (1735). Historia Genealógica de la Real Casa Portuguesa (PDF) (in Portuguese). Vol. I. Lisbon: Lisboa Occidental, na oficina de Joseph Antonio da Sylva. ISBN 978-84-8109-908-9.
Carvalho Correia, Francisco (2008). O Mosteiro de Santo Tirso de 978 a 1588: a silhueta de uma entidade projectada no chao de uma história milenária (in Portuguese). Santiago de Compostela: Universidade de Santiago de Compostela: Servizo de Publicacións e Intercambio Científico. ISBN 978-84-9887-038-1.
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It may be possible to confirm family relationships with Sancho I by comparing test results with other carriers of his Y-chromosome or his mother's mitochondrial DNA.
Y-chromosome DNA test-takers in his direct paternal line on WikiTree: