Hi there
According to my 'Oracle'
The most common suffixes are -ot, -et, -un, -in, -el
The Suffixes -c o c k and -kin (had to put spaces in to get past censor)
These two suffixes are used to form diminutives of the more common names and are frequently used as personal names, sometimes to distinguish son and father, sometimes as pet names.
John and Jankin, William and Wilkin, are both used as names of the same man. Compounds of -c o c k are less common and later than those of -kin which are found in the 12th century
Chris in 1066Land