noun
lass
LASS/læs/
A girl or young woman, especially in Scottish or Irish usage.
The lass walks along the grassy village lane in the Scottish story.

Etymology
A Scandinavian source akin to an Old Swedish expression for “unmarried woman” is considered probable, but the ancestry remains unsettled. The meaning “girl or young woman” is recorded from its earliest appearances.
In context
now father may I marry my lass he asked not unless you can keep her replied the father