Low valley or from the loud hill
Loudon is a surname-derived name with roots in Scottish and English geography. It most likely refers to a location such as Loudoun in Ayrshire, Scotland, which is thought to mean 'low valley' or 'loud hill' depending on the specific Celtic or Old English elements used.
Fewer than 5 boys were named Loudon in 2025.
US births per 5-year period, 1990–present (SSA data).
Grammy-winning folk singer-songwriter
American writer and Life magazine editor
The protagonist played by Griffin Dunne · Who's That Girl
