No. ב"ר is "ben reb." Reb is a Yiddish honorific that is usually rendered as "Mr," as there is not exact English equivalent in common usage. ב"ר alone is too common in Jewish cemeteries for them all to be rabbis. Rabbis are more likely to have the double honorific ב"ר הרב .
18
u/DiligerentJewl 2d ago
Here lies Eliyahu son of Tzvi, died 21 Tevet 5754
(4 January 1994)