1) English surname 
Another variant of the name is Acheson. It corresponds to the English name Atkinson, which is particularly common in Northern England. At the time of the British Census of 1881, the relative frequency of the name Aitcheson was highest in Berwickshire (174.6 times the British average), followed by Haddingtonshire, Roxburghshire, Selkirkshire, Peebl...