Gen 38 Shelah
The three sons of Judah, Er Onan and Shelah, represent Adam, Israel and Joseph, the husband of Mary.
Shelah was named by his mother, and like Onan, the meaning of his name does not apply to him.
Shelah ("petition") was at Chezib ("false") meaning a "false petition".
Shelah, like Joseph, was in line to bear the child of promise, but did not get a chance. Instead, Judah, his father sired the son, as God did for Joseph.