The (-2G), etc., indicates the number of generations before Erven Thoma and his siblings.
Jacob Corneli -- In the 1880 Census for Missouri (1st enum. vol. 35, dist. 133, sheet 15; 2nd enum., vol. 41, dist. 344) we see Jacob, 56 years old, with wife Carolina and 6 children ranging from 8 to 27, living at 2618 Olive. In this second enum. the Jacob family lives near the Philip Corneli family. In the 1886 St. Louis Dir. Jacob Corneli, paver, is living at 2618 Olive (same address as Charles). In the 1900 Census for MO (vol. 99, enum. dist. 332, sheet 3) we see Jacob Corneli, 74 years old, German born, living on Olive St. with a son-in-law, daughter, and 4 grand children. I believe Jacob is a brother to Philip B. Corneli (-3G).
Adolph Corneli -- In the 1899 St. Louis City Dir. we see Adolph Corneli, secretary at Schisler-Corneli Seed Co., 813 N. 4th, residing at 3840a Page Blvd. In the 1900 Census for MO (vol. 98, enum. dist. 325 [or 225], sheet 5, line 31) we see Adolph Corneli, 39, born Aug. 1860 in MO, living at 3840 Page Ave. in St. Louis with his wife Hectaer, 30.
Charles Corneli -- In the 1886 St. Louis Dir. we see Charles Corneli, clerk at Hilger Hardware Co., living at 2618 Olive (same address as Jacob). In the 1900 Census for MO (vol. 103, enum. dist. 420, sheet 5, line 20) we find Charles Corneli with wife Clara (b. Mar. 1864). Can't read street name.
Philip F. Corneli -- barber, residence at 1317 Washington in St. Louis Directories of 1892-96. In the 1896 Dir. his address is 1315 Washington.
George Corneli -- draftsman residing at 3027 Easton Ave. in the 1898 St. Louis Dir. Living with him is Marie Corneli, widow of Philip.
Bejamin (Philip B.?) Corneli, pres. of Schisler-Corneli Seed Co., residing at 4839 Cote Brilliante Ave. (1899 St. Louis City Dir.) In the 1926 St. Louis County Dir. we find Benj. P. Corneli, seeds, residing at 7121 Maryland Ave. in University City.
Marie (Mary) Corneli, widow of Philip, living at 3027 Easton in the 1898 and 1899 St. Louis Directories.