I think that the fathers name is indeed Boaz (Old Testament).
The "r's" and the "z" are similar, however if the emphasis placed on the lower strokes of each of these letters is examined, the heavier pen stroke on the letter "r" used in the exemplars given eg "daughter", "first", and "September", is to the left. On the letter "z" in "baptized", the heavy pen stroke is to the right, as is that on the father's name, although in the latter case it appears to be incomplete, thereby giving cause for doubt.
Istrice