The female name Annabel is a dissimilation of Amabel, whence Mabel.
Three of the most important of these are assimilation, dissimilation, and metathesis.
Dissimilation is first found in philological works published in the decade 1874-85.
In the family name Hansom, for Hanson, we have dissimilation of n (see p. 57).
Let us first of all glance at some of the most important ...