A sept is an English word for a division of a family, especially of a Scottish or Irish family. The word may derive from the Latin saeptum, meaning "enclosure" or "fold", or via an alteration of "sect". The term is used in both Ireland and Scotland, where it may be translated as sliocht, meaning "progeny" or "seed", which may indicate the descendants of a person (for example, Sliocht Brian Mac Diarmada, "the descendant of Brian MacDermott").

September ( ) is the ninth month of the year in the Julian and Gregorian Calendars and one of four months with a length of 30 days.