Caesar Joachim Trognaesius or Troigney (born 1590) was a 17th-century printer-bookseller and calligraphic type designer.
Caesar Joachim continued the bookshop and printing business of his father, Joachim Trognaesius, on the churchyard of Antwerp Cathedral.
His date of death is unknown.
Calligraphic type of his design was demonstrated in Nouvel A.
B. C., published by Arnold van Brakel in Antwerp in 1671.