Rav Kook, mentioned in this article by Gadi Taub, was born in Grīva (then a separate village on the Courland side of the river, now part of Daugavpils). Stranga, in Ebreji Baltijā, gives some background on the influences on Kook’s thought in Daugavpils and Ludza.

Vysu lobu,
/P