I am unable to find the marriage of edmund and frances however by way of speculation I believe that the marriage is recorded in Dec QRT 1845 GRO index as
Aylesbury Edmund Swaffham 13 735
POWLEY Frances Swaffham 13 735
This may seem a bit of a stretch to misspell Allensby but it is possible that the name was misheard by the registrar and he wrote down what he thought. You can see the ‘original’ GRO page from Free BDM but it’s a typed page which means it was probably copied from a written entry. I have come across other misspellings or variations especially transcripts from census documents.
In the 1901 census search pages the following are probably related but I have not down loaded the census page to see the entire households
Edward Starr 22 Lancs Bootle Lancashire Bootle Cum Linacre Slaters Labourer
John Starr 28 Herts Hitcher Lancashire Bootle Cum Linacre News Agent
Frances Allensby 78 Norfolk Norfolk Lancashire Bootle Cum Linacre
Ralph Star 25 Lancs Bootle Lancaster Litherland Dock Labourer
Isabella Star 15 Lancs Bootle Lancaster Litherland Juvenile
John Star 57 Cambridgeshire Ely Lancaster Litherland Skinner
Charlotte M Star 56 Gloucestersh Minching Hampton Lancaster Litherland
Your ancestor John Star I have as born in Hitchin Herts as per the 1881 census which you can look up on the LDS site and from the GRO index Births Mar 1874 Starr John - Hitchin 3a 342.
I have him married to a Martha Kelly in 1901