Riškus

Cf. Riškà, Riškẽvičius, Riškỹs, Rỹškus (see), Latv. Riska (LAG 499). Further connections are doubtful - cf., let's say, still in Poland. Ryszka, Ryszko, Ryszkowic, Ryszkowski (SSNO IV 536) or bRuss. Pыжка, Pыжкo, Pыжкoвiч, _Pышкoу_̆, Pышкoвiч, Pышкевiч (М). Биpыла, 1969, с. See also Z. Zinkevičius, 1977, p. 190.