His name is Frank Carroll. He was born on 18/08/1885. I got the Mr Bolli info from his army service record dated 17/10/1900.
Frank lived on New John Street, and Mr Bolli lived on Pritchett Street, so they were pretty close to each other.
Hi
I had another look, and I think that these are all the same people:
Franciscus Carroll born
18/8/1885, bapt 12/9/1885 Birmingham
Parents Jacobi Carroll and Helenae Reating Carroll
FHL film no. 1999524
(siblings seem to have mother as Riding/Reading and father as Cahill, and possible births and the 1881 census fit)
1891 census
Francis Carroll 6
(parents James and Helen)
1901 census
Frank Carroll porter bottler
(living with married sister Anne Hicks and their brother Richard)
1902
Richard Carroll marries, Frank Carroll is witness
1903
Frank Carroll marries Nellie Bumford
Witnesses Harry Davies and Ellen Bumford
1911 census
Frank Carroll 29
(living as "nephew" of Minnie Brittain 38, and with Albert Carroll aged 6)
Backtracking on Minnie:
1901 census
Minnie Elliott 29 wid
Mrs Rumford 33 wid sister
Nellie Rumford 15 niece
Harry Davies 16 brother
1891 census
Minnie Elliott 20
(married to Harry)
Mar qtr 1890 marriage
Minnie Davies
Harry Elliott
1881 census
Nellie Davis 14
Minnie Davis 10
(sisters, parents Frederick and Ann)
Everything is Birmingham for locality/birthplace.
So, even though the the 1911 census seems to have Frank Carroll born in Sheffield (and the image is a bit confusing) I still think it is him because Aunt Minnie Brittain was originally Minnie Davies and sister to Nellie Davies who married William Bunford. They were the parents of Nellie Bumford who married Frank Carroll. And I suspect that the witnesses to the marriage were Nellie's uncle Harry Davies and her mother Nellie/Ellen Bunford.
The surnames are all a bit over the place: Bumford/Bunford/Rumford; Davis/Davies; and I suspect Carroll/Cahill. But I think it all holds together.