Mem Pires de Longos - Mem Pires de Longos birth Date

Mem Pires de Longos MP
Gender: Male
Birth: circa 1175
Death: April 1227 (48-56)
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Mem Pires de Longos
Nome completo Mem Pires de Longos
Nascimento 1120
Condado Portucalense
URL: https://pt.wikipedia.org/wiki/Mem_Pires_de_Longos
How could he has a son born 1160?
Gomes Mendes de Briteiros
And a daughter (Sancha Mendes de Briteiros) born before 1060?
Anything makes sense, please curators, attend this timeline
//Bruno BravoMalo