Have not got 1841 but 1851 might solve the puzzle.....
William Munday hd 46 Benson farm lab Emma Munday wi 43 Stokenchurch lacemaker Ezra Munday so 21 Lewknor farm lab Joseph Munday so 17 Gt Marlow farm lab George Munday so 12 Gt Marlow farm lab William Munday so 7 West Wycombe Address Mr Wheelers Cottage West Wycombe.
Jonathan Munday hd 46 Hambledon shoemaker master Elizabeth Munday wi 45 West Wycombe Henry Munday so 18 Hambledon shoemaker journeyman Fanny Munday da 16 Hambledon
This looks like the right one for age and profession but place of birth is different.....
1851 Joseph Monday hd 22 London shoemaker Sarah Monday wi 22 Lewknor Elizabeth Brazier vi 16 Fingest. Living at Moor Common Grt Marlow. Same place as Jonathan & family....
Tazzie. Looking at Lane End and London close together it could just be an error.