Alexia Walkin Black

Alexia Walkin Black was a pure-blood witch. She was an early member of the House of Black, predating Arcturus Black I and Cygnus Black I, but her precise relationship to other known members of the Black family is unknown. She never married, according to the Black family tree tapestry, and was childless.

Etymology
Alexia is the feminine form of Alexis. The Greek name Αλεξις (Alexis), which meant "helper" or "defender", is derived from the Greek αλεξω (alexo), meaning "to defend, to help". This was the name of a 3rd century BC Greek comic poet and also of several saints. It is used somewhat interchangeably with the related name Αλεξιος (Alexius), borne by five Byzantine emperors.

Black can be considered a color and is the result of the absence of, or complete absorption of, light. In Western culture, the color black has typically been associated with evil, darkness, and witchcraft but also with prestige and sophistication - appropriate for the House of Black. Black has also been associated with life and prosperity by other cultures. In ancient China, black was the symbol of the element of water, which also corresponds to Slytherin, the Hogwarts house of almost all members of the Black family. In English heraldry, black represents darkness and ignorance, which may be a possible allusion to the prejudice common to members of the House of Black.

However, the English word black is derived from either the Old English blœc, meaning "black", or blac, meaning "pale". Pallor is associated with sickness and the color white, which is usually held to symbolize purity in Western and Indian culture and death in East Asian cultures. This mirrors the typical coloring of members of the House of Black - dark hair and pale skin.