In this post, the DMNES researchers look at a collection of diminutive suffixes: -el, -et, -in, -on, -ot, and their feminine forms. Withycombe calls them French , and while their use in England was certainly strongly influenced by the invading Normans, the suffixes ultimately derived from Latin, and as a result can be found throughout Romance-speaking areas. These diminutive suffixes were used individually but also in combination with each other, as in the name Mathelin, a French diminutive of Matthew formed by adding -el and then -in, or in Arthurian Lancelot, formed from Lance by addition of -el and -ot.
Many common modern names reflect the use of one or more of these suffixes. For example, Marion and Alison, now often considered independent names in their own rights, derive from Mary and Alice with the addition of -on. Another familiar modern name, Colin, shows the use of -in added to Colas, a French hypocoristic of Nicholas; Col(l)ette is constructed in a similar fashion from Nicole). Harriet derives from Harry, an English spelling of the French pronunciation of Henry, while Charlotte is a feminine form of Charlot, a French diminutive of Charles; the Italian cognate is Carlotta. The same suffix added to Elias gives Eliot.
The suffix -ot was quite popular in feminine names in both England and France between the 14th and 16th C, when we can find names such as Agnesot (from Agnes), Clarote (from Clara), Em(m)ot (from Emma), Harriot (like Harriet), Margot and Marguerot (from Margaret), Mariot (from Mary), Ph(e)lippote (from Philipa). In England, Wil(l)mot was an incredible popular diminutive of Willelma in the 16th C.
In the DMNES earlier survey of where diminutive forms are the most popular, they saw that Portugal and Spain were among the regions with the lowest percentage of nicknames. What we do see in Iberia are diminutives formed by these suffixes. In Spain, the most common suffixes are -ino/-ina and -ot (for men) and -eta (for women), with examples such as Angelina (from Angela), Blanquina (from Blanche), Bernardino (from Bernard), Francina (from Frances), Huguet (from Hugh), Johanot (from John), and Loreta (from Laura). We have only two diminutives from Portugal — not enough to draw any conclusions from — and both are examples of Joaninus, an early 13th C diminutive of John.
Finally, we comment on the use of these suffixes in Italy, in particular in one data set from Imola in 1312 . This dataset has 2165 men bearing a total of 734 distinct name forms, and 326 women bearing a total of 174 distinct name forms; in this data set, nearly half of the names are hypocoristics or diminutives. There are 35 distinct diminutive suffices in the data, ranging from suffixes which appear only once to one which has 105 instances. 26 are used by men, 9 by women, and one is used by both men and women. Seven of the suffixes are compound, as in the examples of Mathelin and Lancelot above. In four cases, the first suffix is -(l)in-, being compounded with -ella, -ell(i)us, and -ucius; two of the remaining three have the same second suffix, -ellus, being compounded with -in- and -con-. As a result, the data shows a strong preference for compounding with -lin- and -ellus, with only one compound suffix containing neither of these (Bertholloctus, from Berthold); and this is the only example of this compound. The penchant the Italians had for stringing together diminutive suffixes results in some rather short names having excessively long nicknames. The most amusing example of this is Ugo, an Italian form of Hugh. The root name is about as short as you can get, but take a look at the variety (and length) of the nicknames!
 Withycombe, E.G., The Oxford Dictionary of English Christian Names, 3rd ed. (Oxford: Oxford University Press, 1988), p. xxxii.
 Uckelman, Sara L., “Given Names in Early 14th-Century Imola”, article in preparation.