Where does “kissing cousin” come from?

kissing cousin (English) comes from English cousin, from Middle English cosyn, from Old French cosin, from Latin cōnsōbrīnus, from Latin cōn-, from Latin cum, from Old Latin com, from Proto-Italic kom — to bend; curve; arch; vault; to bow, bend, arch,...

kissing cousin (English): A relatively distant relative, or a friend, who is familiar enough to be greeted with a kiss

Definitions

  1. A relatively distant relative, or a friend, who is familiar enough to be greeted with a kiss

Ancestry of “kissing cousin”, step by step

kissing cousin traces back through two separate lines of ancestry.

via English cousin

StepLanguageWordMeaning
1EnglishcousinThe child of a person's uncle or aunt; a first...
2Middle EnglishcosynA member of one's family; one's partner, relative...
3Old Frenchcosincousin
4Latincōnsōbrīnusa first cousin, cousin-german
5Latincōn-Used in compounds to indicate a being or bringing together of several objects
6Latincumwith, along with; at; -fold
7Old LatincomAlternative form of cum
8Proto-Italickomwith, along, at
9Proto-Indo-Europeanḱómbeside, near, by, with
10Proto-Indo-EuropeanḱeDeictic particle, here; Post-positional...
11Middle Englishkyt
12Germankittputty certain kinds of cement used for fixing e.g. window panes
13Old High Germankuti
14Proto-West Germanickwidugum, resin
15Proto-Germanickweduzresin
16Proto-Indo-Europeangʷet-resin, gum; to say, speak
17Proto-Indo-Europeangū-to bend; curve; arch; vault; to bow, bend, arch,...

via English kissing

StepLanguageWordMeaning
1Englishkissingpresent participle of kiss; That kisses; Just...
2Middle Englishkissyngekiss action of kissing
3Middle Englishkissento kiss
4Old Englishcyssanto kiss
5Proto-West Germanic*kussijanto kiss
6Proto-Germanickussijanąto kiss
7Proto-Germanic-janąDerives denominatives from nouns and factitives...
8Proto-Indo-European-yétiCreates intransitive, often deponent,...
9Proto-Indo-Europeanyé-
10Chichewaiyehe, she
Every word from Proto-Indo-European gū-Every word from Latin cōn-Every word from Proto-Indo-European gʷet-