virolain

Ingrian

From viro (“Estonians”) +‎ -lain. Akin to Finnish virolainen and Votic virolain.

virolain

Estonian (person of Estonian ethnicity)
- 1936, L. G. Terehova, V. G. Erdeli, translated by Mihailov and P. I. Maksimov, Geografia: oppikirja iƶoroin alkușkoulun kolmatta klaassaa vart (ensimäine osa) [Geography: textbook for Ingrian elementary school third grade (first part)], Leningrad: Riikin Ucebno-Pedagogiceskoi Izdateljstva, page 3:
  Territorialisest, oman elopaikan poolest, iƶorat ollaa soomalaisiin, venäläisiin, virolaisiin ja vadjalaisiin naapurinna.
  Territorially, according to [their] own place of residence, Ingrians are neighbours to Finns, Russians, Estonians and Votes.

Declension of virolain (type 1/kärpäin, no gradation)
	singular	plural
nominative	virolain	virolaiset
genitive	virolaisen	virolaisiin
partitive	virolaista, virolaist	virolaisia
illative	virolaisee	virolaisii
inessive	virolaisees	virolaisiis
elative	virolaisest	virolaisist
allative	virolaiselle	virolaisille
adessive	virolaiseel	virolaisiil
ablative	virolaiselt	virolaisilt
translative	virolaiseks	virolaisiks
essive	virolaisenna, virolaiseen	virolaisinna, virolaisiin
exessive¹⁾	virolaisent	virolaisint
¹⁾ obsolete ^) the accusative* corresponds with either the genitive (sg) or nominative (pl) ^) the comitative** is formed by adding the suffix -ka^? or -kä^? to the genitive.

Ruben E. Nirvi (1971), Inkeroismurteiden Sanakirja, Helsinki: Suomalais-Ugrilainen Seura, page 669

From viro +‎ -lain. Compare Finnish virolainen.

virolain

Declension of virolain (type XII/sinin, no gradation)
	singular	plural
nominative	virolain	virolaizõd
genitive	virolaizõ	virolaisijõ
partitive	virolaissõ	virolaisiit
illative	virolaisõ, virolaisõsõ	virolaisiisõ
inessive	virolaizõz	virolaisiiz
elative	virolaizõss	virolaisiiss
allative	virolaizõllõ	virolaisiillõ
adessive	virolaizõll	virolaisiill
ablative	virolaizõlt	virolaisiilt
translative	virolaizõssi	virolaisiissi
^) the accusative* corresponds with either the genitive (sg) or nominative (pl) ^) the terminative** is formed by adding the suffix -ssaa to the short illative (sg) or the genitive. ^*) the comitative** is formed by adding the suffix -ka to the genitive. For dialectal differences between case endings, see Appendix:Votic dialects.

Hallap, V.; Adler, E.; Grünberg, S.; Leppik, M. (2012), “virolain”, in Vadja keele sõnaraamat [A dictionary of the Votic language]‎^[1], 2nd edition, Tallinn