Compound names whose stems arose from hypocoristics constitute a
subtype of Lithuanian names. Research of historical sources has revealed some new
such names: Bučvilà, Bùgvydas (or Bgvydas), Bùtkvilas, Daũdvilas, Daũnepras,
Daũtvilas, Eĩtgilas, Geĩtmantas, Kančeigãlas (or Kančeigáila), Nórgvilas, Tatavydas,
Vaĩstvilas. It has also been shown that components originating in hypocoristics are
found in the already known Daũdgėlas, Geĩtkantas, Geĩtvydas, Gibutkis. These
names show that the inventory of proper names was expanded with parts of other
names and that names originating in hypocoristics influenced compound names. The
new stems buč-, bug- (or būg-), butk-, daud-, daut-, eit-, geit-, kanč-, nepr-, norg-,
vaist- can be added to the already known buk-, darg-, eid-, eig-, jog-, jos-, tart-. The
base of such stems originated in the first component of a compound name and the
beginning of the second component, extended with a suffix. Except for darg- and
vaist-, the stems are only found in Lithuanian names, which implies that they were
created apart from Prussian.

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