The story
* As a German surname, variant of Kroll. * As a Scottish (by way of Norman) surname, from the same source as Croall. * As an English surname, variant of Curl. * As a Polish surname, Americanized from Król. Compare Krol. Similar Slavic counterparts are found in Kralj, Král, Kráľ; see Kral.
Etymology from Wiktionary, CC BY-SA 4.0.