Henry Allen Deming
- Born: 29 May 1836, East Hartford CT
- Marriage (1): Anna Eliza Sage on 25 Jun 1861 in East Hartford CT
- Died: 12 Feb 1903
General notes:
Jeweler and watchmaker
Events in his life were:

- Partnership: Louis Gundlach, circa 1855-1875, in Hartford CT. As DEMING & GUNDLACH. Listed in the 1861 and 1875 city directories with a shop at 20 State Street.
- He appeared on the census in 1860 in Hartford CT. Listed as a jeweler.
- He appeared on the census in 1870 in Hartford CT. Listed as a jeweler.

- Example: Tradecard, in 1870, in Private Collection.

- Example: Tradecard, in 1870, in Private Collection.

- Example: Tradecard, in 1870, in Private Collection.

- Advertised in the Geer's Hartford Directory (Hartford CT), 1875
- He appeared on the census in 1880 in Hartford CT. Listed as a jeweler.
Henry married Anna Eliza Sage on 25 Jun 1861 in East Hartford CT. (Anna Eliza Sage was born on 29 May 1842 in East Hartford CT.)
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