Idk why the original considered Czech names "czad", they're quite unremarkable:
♙ Foot soldier
♖ Tower
♔ King
♕ Lady (not Queen because that would start with the same letter as King)
♗ Archer
♘ Cavalryman (sometimes also Horse but that also starts with K)
(Pěšec, věž, král, ~~královna~~ dáma, střelec, jezdec/kůň.)