LT2008 m. Jankūnų kaimo gyventojas Ročkių kaime rado XVII a. pradžios sidabrinių monetų (195 vienetai) lobį (1621–1622 / 2008). Monetos rastos arime, buvusio kaimo vietoje. 2006 m. kaimavietėje žvalgymų metu buvo rasta XVII–XVIII a. žiestos kaimiškos keramikos (ATL 2006 metais, V., 2007, p. 492), surinkti duomenys apie akmenį smailiadugniu dubeniu (ATL 2005 metais, V., 2007, p. 405) [p. 515].
ENIn 2008 a Jankūnai village inhabitant found a hoard of 195 early 17th-century silver coins (1621–1622 / 2008) in Ročkiai village. It consisted of 1589–1621 Sigismund III Vasa Rīga shillings (136 coins), and a 1621 three-halfgroat coin, 1620–1621 GDL two-denarii coins (10 coins), a 1614 GDL shilling, 1620 (2 coins) and 1622 (1 coin) Polish twodenarii coins, 1616–1619 Polish shillings (13 coins) and counterfeit shillings (2 coins), 1615–1620 Polish three-halfgroat coins (21 coins), a 16[...] Holy Roman Emperor Rudolf II three-halfgroat coin, a 1618 atthew I three-halfgroat coin, a 1615 Pomeranian three-halfgroat coin, 1614, 1618, and 1621 Brandenburg–Prussian threehalfgroat coins (three coins), and coins that have not been precisely determined (2 coins).