okay, just randomly looking at stuff about NL. Groningen looks neat. Huh, noteworthy locals included a stage magician who bought it in the camps.
*klick*
aha, notable Dutch Jews
*klick*
Wait a moment, there was a classical composer, from Groningen, Joseph Ascher. ASCHER?
... I mean there's very little chance the guy was a relative, there are tons of Aschers from outside Ukraine, but it's not impossible.