Benjamin Mendez Seixas merchant, a founder of the NY Stock Exchange (1747–1817) Parents Isaac Mendes Seixas Rachel Franks Seixas Children Esther B. Seixas Sarah Mendes Nathan Isaac B. Seixas Siblings Grace Seixas Nathan Gershom Mendes Seixas Moses Seixas Abraham Mendez SEIXAS Abigail Judah