The well known wood for ukulele making worlwide is Koa and you might get surprised by the fact that I do not use it, why that?
The luthierie school I attended is originally an ancient instrument making school and, although it got modern over the years, traditional building tecniques are still very in use. I got taught a method that could be defined as “European”. I get inspired by the classical luthierie and its woods: Maple, Spruce and Ebony. I sometimes use other woods but in a small percentage, I also try to avoid the ones that are under environmantal bonds.