Grandecort is derived from the OakPark family. It has lost the serifs, and has moved to a more traditional look. The upper case letters are a bit heavier than the lower case letters, but overall the letter shapes are fairly conventional for a bold, display face.
Yahosch is based on egg-shaped circular elements, with the larger part of the oval on the bottom. The thin is very readable even at smaller point sizes where it appears much like neat hand printing.