For this Alan Arthur William there are 2 different names on Yasni.
In the ranking of the most common first names Alan Arthur William is on position 4589.
Male first name (German, English, Scottish): Alan, Celtic (Word format); al = the rock, came in the Middle Ages with the Normans to England significance not sure clarified, perhaps of Celtic and Breton 'al' (rock)
Male first name (German, English): Arthur, the bear, Celtic (Arthurian legend) = arth, the bear laid artus = (Latin), spread by the legend of King Arthur and his Round Table (6th century (?) ), the origin of the name is resolved not sure, perhaps of Celtic 'arth' (bear), a word which was Latinized as 'artos', perhaps from the Latin 'Arthur' (fixed)
Male first name (English, French): William, Old High (two-part name); willio = the will, determination; helm = helmet, the coverage, coverage, protection, old German two-part name, in the Middle Ages in Europe popular; Name several famous kings, for example, by William the Conqueror, the first Norman king of England