When I first became interested in genealogy and started asking my grandparents about their parents and grandparents, they both described my grandmother's grandmother as "Dutchy". I initially thought I had stumbled on a family connection to the Netherlands that I never knew existed but then it became clear they were talking about her personality or mannerisms. The sense I got was that they both were very fond of her, but...(she was "Dutchy").
Both of my grandparents were born in 1914 and this great-great grandmother died in 1933, so I'm wondering if this was an expression from their youth (in the Midwest U.S.). I did a Google search and there are several expressions that incorporate the word Dutch, usually in a pejorative sense. I found this page, which includes the expression "His dutch is up," meaning dander/temper. Is anyone else familiar with this usage?