The best match in the births is an Arthur Henry Clarence, born Camberwell in Q4 of 1872. Has the advantage of matching the birthplace of Joseph Peachey - a tenuous connection though it may be.
The 1911 image shows no sign of an "A" on the end of Louis, who claims to come from York.
A check of the London baptisms on Ancestry shows a Louis George Clarence, born 19 Sep 1843, son of Louis Arnand & Mary Ann, baptised at Holborn in 1849. Could this be a relative?