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See de línse, (Sloinnte Gaedheal is Gall )

Norman 'de lench,' i.e., at the linch, or hill, from residence; the name of a family who soon after the anglo-norman invasion settled at knock in co. meath. a branch of this family, about the beginning of the 14th century, removed to galway where they became one of the leading 'tribes' and occupied a distinguished position down to the end of the jacobite wars when several of the name were attainted and their property confiscated. there are, however, several respectable families of lynches still in connacht. this surname is to be distinguished from the irish Ó loingsigh, which see, (Sloinnte Gaedheal is Gall )

Descendant of loingseachán' (diminutive of loingseach); the name (1) of a family of the cinel eoghain in ulster, who are descended from loingseach, king of ireland, and were seated in the present county of donegal; also called mac loingseacháin and Ó loingsigh, which see; and (2) of a family of the ui fiachrach, formerly seated in co. sligo. it is now almost always anglicised lynch, (Sloinnte Gaedheal is Gall )

Descendant of loingseach' (derivative of loingeas, a fleet, i.e., having, or belonging to, a fleet or navy); the name of several distinct families in different parts of ireland, as:

(1) Ó loingsigh of dalradia, once a very important family. in the 11th century, they were chiefs of dalradia, in the present counties of antrim and down, and are frequently mentioned in the annals. they were dispossessed at the time of the anglo-norman invasion of ulster, but are still numerous in antrim and down. (2) Ó loingsigh of owney, also a family of note in early times. before the anglo-norman invasion, they were chiefs of uaithne-thire, now the barony of owney in tipperary, but were afterwards dispossessed by the o'mulryans.

(3) Ó loingsigh of breifney, a strong clan, who were chiefs of cinel bacaid, and are still numerous in co. cavan.

(4) Ó loingsigh of thomond. a dalcassian family, still numerous in clare and limerick.

(5) Ó loingsigh of cork, a branch of the corca laoighe, who were originally seated in west cork.

(6) Ó loingsigh of sligo, a branch of the ui fiachrach.

(7) Ó loingsigh of meath. Ó loingsigh is often a shortened form of Ó loingseacháin (which see), especially in donegal, mayo, and cork. in co. galway, it is sometimes metathecised to Ó loinscigh, which see. lynch is now one of the commonest of irish surnames, and, as might be expected, is found in every part of ireland, (Sloinnte Gaedheal is Gall )

Thomas Lynch | The Lynch Family