grand kids stopped singing and touring a few years ago
They were the second son's great grandchildren , they were really popular around 2009-15. Beautiful voices, and from what I read, nice young people. They always dressed classy. According to an 2016 article they quit their musical careers to pursue other interests. Makes sense due to the fact they were getting older. maybe they were not fans of the celebrity life. They got their start singing Austrian folk songs taught to them by grandpa.
Kurt portrayed the grandpa. I read on YouTube he passed away years ago. I will have to research his name when I get the chance.
https://www.playbill.com/article/the-von-trapps-will-say-adieu