Diminutive of Andrew: Manly. From the Greek Andrew. Has long been a popular Scottish name, because St. Andrew is the Patron Saint of Scotland after whom the town of St Andrews was named.
Diminutive of Archibald: True and bold. Also 'bald'. Introduced from England and Germany during the Norman conquest, the Scottish interpreted the 'bald' to refer to the shaven head of a monk.
Diminutive of Arthur: From the Roman clan name Artorius, meaning noble, courageous. Famous bearer: Legendary sixth century King Arthur of Britain and his Round Table of knights. This legend dates to the early 9th century.