As an English Christian name, Abraham became common after the Protestant Reformation. A famous bearer was the American president Abraham Lincoln (1809-1865), who pushed to abolish slavery and led the country through the Civil War.
Already an uncommon masculine name, it slowly grew in popularity for American girls beginning in 1978 after the start of the sitcom WKRP in Cincinnati, which featured a character with this name. Though it remained more common as a feminine name, it got a boost for boys in 1994 from another television character on the drama Party of Five. In the United Kingdom and Australia it has always been more popular for boys.
In England the name became rare after the Middle Ages, but it was revived in the 19th century, more commonly in the spelling Beatrice. Famous bearers include the British author and illustrator Beatrix Potter (1866-1943), the creator of Peter Rabbit, and Queen Beatrix of the Netherlands (1938-).
According to tales first recorded in Old French in the 12th century, Yseut or Ysolt was an Irish princess betrothed to King Mark of Cornwall. After accidentally drinking a love potion, she became the lover of his nephew Tristan. Their tragic story, which was set in the Arthurian world, was popular during the Middle Ages and the name became relatively common in England at that time. It was rare by the 19th century, though some interest was generated by Richard Wagner's opera Tristan und Isolde (1865).
This name was known among the Normans due to the Welsh bishop Saint Samson, who founded monasteries in Brittany and Normandy in the 6th century. In his case, the name may have been a translation of his true Celtic name. As an English name, Samson was common during the Middle Ages, having been introduced by the Normans. It is currently most common in Africa, especially in countries that have an British colonial past.