Which dutch players have played for Celtic and Rangers?
"I think it was Ronald De Boer after he left Barcelona." Not the
case - both Ronald and Frank played for Rangers, not Celtic. No
Dutch players have played for both - Rangers were linked with
ex-Celt Pierre Van Hooijdonk when Dick Advocaat was in charge,
Celtic were linked with Giovanni Van Bronckhorst before he left
Arsenal. Neither came about.