About Carlos Luis de Borbón y Bragança
Carlos Luis María de Borbón (31 January 1818 – 13 January 1861) was the Carlist claimant to the throne of Spain under the name Carlos VI after his father's renunciation in 1845. He used the title Conde de Montemolín (Count of Montemolín). When his father renounced his succession rights on 18 May 1845, Carlos Luis became the Carlist claimant.
Biography source: Wikipedia. The profile adds birthday-specific historical context from the Celebs Birthday Today editorial database.