1940s; earliest use found in School Arts. Either from rosemal- + -er, after Norwegian rosemaler, or directly from Norwegian rosemaler from rose + male + -er.
Definition of rosemaler in US English:
rosemaler
noun
A person who practises rosemaling.
Origin
1940s; earliest use found in School Arts. Either from rosemal- + -er, after Norwegian rosemaler, or directly from Norwegian rosemaler from rose + male + -er.