Transferred use of the surname, a local name from any of the numerous places named with Old English clif ‘cliff, slope, riverbank’ + tūn ‘enclosure, settlement’. Use of this as a given name is more recent than that of Clifford. It may in some cases have been adopted as an expanded form of Cliff.
English: from the Old Norse personal name Ásbjorn, composed of the elements ás ‘god’ + björn ‘bear’. This was established in England before the Conquest, in the late Old English form Ōsbern, and was later reinforced by Norman Osbern. The surname Osborne has also been widely established in Ireland since the 16th century.