It is said by Walton researchers that Boaz moved to Westmoreland County around the turn of the century (i.e. about 1800). And he lived, per his tombstone, to 1823 (or 1825). But, curiously, I do not see Boaz in any Census after 1790 in Northampton County.

I believe he was living with William Martz in 1810. That household had a man and woman age

Boaz served in the Northampton militia unit under Col William Meyers, the same unit George Martz served in.

On the Carbon County Genweb site, there is a file of Gnadden Huetten church records and it lists the 29 Sep 1793 baptism of daughter (?) Emy (born 7 Jul 1793) by by Boas and Mary Walton.