Xavier traces to a Basque place name usually translated as "new house," later carried into wider use through a well-known missionary who took it as a surname. The name suggests a fresh start built on solid ground -- newness paired with structure rather than instability.
When the Moon and lord of the ascendant shall be impedited by the lord of the 8th, the sick person hath cause to fear. - William Lilly (1602.-1681.)