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He was christened Christopher Adam Gerock at St Ethelburga, Bishopsgate in 1768.
He married Ann Joyner at St Alphage, London Wall in 1799; both were from that parish.
He was assessed to Land Tax from 1799-1802 on property in Red Cross Square, Clerkenwell.
A daughter was christened in 1802 at St Giles, Cripplegate. Her father was noted as a musical instrument maker. Website information indicates he manufactured woodwind instruments.
He was made free by redemption in the Musicians Company in 1805.
Two of their children were christened at St Ethelburga, Bishopsgate in 1807 and 1810.
He was assessed to Land Tax on property in Bishopsgate from 1806-10, on property in Norton Folgate from 1811-12, in Cornhill from 1826 and in 13 Harley Place, Bow from 1835.
He appears in Pigot’s London Directory for 1825-6 as a Flute or Flageolet Maker at 76 “Bishops” (possibly Bishopsgate Street).
The burial of his wife Ann aged 66 years, late of Harley Place, was recorded at St Ethelburga church in 1837.
His death was registered in Poplar in 1850.

The Will of Christopher Adam Gerock, gentleman of Bow Road, was proved for probate on 19th April 1850 (National Archives reference PROB 11/2111/300).

MCB wrote:He was made free by redemption in the Musicians Company in 1805.

13 November 1804 Christopher son of Jacob Gerock of Ritzfield near the City of Weinsburg in the Duke of Wirtenberg's Dominions in Germany Wine Cooper was this day admitted to the freedom of the Worshipful Company of Musicians by redemption. (It seems likely that this order was allowed to expire without being executed, and the (14 May) 1805 order was executed.)