what is the meaning of half brother or sister
Sibling Half-siblings are people who share one parent but not both. They may share the same mother but different fathers (in which case they are known as uterine siblings or maternal half-brothers/half-sisters), or they may have the same father but different mothers (in which case, they are known as agnate siblings or paternal half-brothers/half-sisters. In law, the term consanguine is used in place of agnate). They share only one parent instead of two as full siblings do and are on average 25% related.[3]
House of Carrillo Carrillo is a Spanish surname, and reference to the family dates back to the Kingdom of Castile in the thirteenth century. According to a family origin legend, two brothers sharing royal bloodline accidentally killed a favorite courtier of the King of Italy, which forced them to flee into hiding to avoid his rage (it is said that the brothers dueled with the courtier over the honor of a beautiful Spanish maiden). The brothers eventually arrived in Spain after being placed under the protection of Fernán González of Castile.[1][2][3] (their country of origin is unknown). There they were so loyal to each other, they never left each other's side, and hence were called by the Castilians Carrillo, which is given several false etymologies: "loyal or devoted", implying that the brothers were very close one to another like the "carillon bells of the church towers", or comparing them to "two wheels on a cart". The brothers endeared themselves to the Castilians, and married two daughters of the Count. He gave them the titles of Count of Priego for the elder brother, and Marquis De La Guardia for the younger. All lines of the Carrillo family are said to branch from these two brothers. The name also appears in connection with an ancient Spanish legend concerning the Siete Infantes de Lara (Seven Princes of Lara).