Some rather recent-ish stuff done with them was Gundra was established as having tried to invade Themyscira in the ancient past with the Valkyries as well as being an ancestor of Paula Von Gunther. This is from Orlando's run. She also showed up in an issue of AOP.
For Duke of Deception he's only sporadically been in WW stuff since post-Crisis. But as AmiMizuno brought up, a reinvented version of showed up in the Legend of Wonder Woman book from a few years back. I thought it was pretty cool, would have a made good basis for the villain of WW84 over more Max Lord.