How about a block that relates to the state he was born/married or lived in? I've used the Ohio Star for such a block. You could also design one using his initials, with squares and 1/2 triangles. Do you know if he went to college or what he did for a living? Did he have a hobby like fishing? All can be creatively used. Even a sunbonnet boy (can't remember the name they gave him!), or a pet block works. Lots of choices!