Josef Lada was born on December 17, 1887.

Josef Lada was born on December 17, 1887.

Josef Lada died on December 14, 1957, in Prague, Czechoslovakia [now Czech Republic].

It's most probably his grandson Josef Lada (*1960), who recently re-published some of Lada illustrations in new books.

However, you would have to examine the question of whether the copyright on a particular work of his expired 50 years after publication, 50 years after his death, or 70 years after death (which will be 2027).

Legally, the author of any work owns the copyright until they transfer it to others or it is transferred by law (such as inheritance).