Hi,
If I have the right Samuel John RIX then I might have a suggestion as to why he was called HUNT in 1901.
The 1911 census gives his POB as Norwich. His marriage certificate shows his father as Samuel, deceased, a shoemaker, so my idea starts with him.
1871 RG10/1809 f.42 p.29 Norwich, Norfolk
Little Bull Close
RIX
John Head M 59 Silk Weaver Norfolk Norwich
Ann Wife M 60 " "
Sarah Daur U 30 " St Faiths
Samuel Son U 21 Shoe Maker " Norwich
Albert H Grandson 12 Errand Boy " "
ALLISON
Ann Daur M 33 Silk Weaver " "
John W Grandson 12 Scholar " "
Sarah Grandson 4 " " "
Albert H Grandson 2 " "
James A Grandson 9m " "
Marriage Samuel RIX Dec Q 1872 Blything 4a 1549
Caroline CHAPMAN
07 Oct 1872
Bramfield,Suffolk
Samuel RIX
Caroline CHAPMAN
Father: John RIX
Father: Robert
(A Caroline CHAPMAN born Wissett, Suffolk is living with her father Robert and family in Bramfield in 1861. In 1871 she is working in Norwich)
BirthsSamuel John RIX
Sep Q 1877 Norwich 4b 165
Alice Maud Rix
Jun Q 1879 Norwich 4b 121
DeathSamuel RIX
Sep Q 1879 Norwich 4b 69
Age: 29
1881 RG11/1949 f.28; Page: 49 Norwich St Benedict
Napier Street
RIX
Caroline Head W 33 Suffolk Bramfield
Samuel John Son 3 Norfolk Norwich
Alice Maud Daur 1 " "
William CLARKE Lodger ? 25 Shoe Choker? Norfolk Norwich
Eliza " " ? 27 Shoe Machinist " "
MarriageCaroline RIX Sep Q 1883 Poplar 1c 1115
Henry HUNT
Poplar All Saints
9 Jul 1883
Henry HUNT F Age Widower Shoe Finisher Poplar Father: John HUNT, Labourer
Caroline RIX F Age Widow Poplar Father: Robert CHAPMAN, Farmer
Witnesses: William HUNT, Ada Jane CHIVERS
Caroline HUNT, nee CHAPMAN, late RIX is living with her husband Henry in Poplar in 1891, 1901 and 1911.
Samuel and Alice weren't with Caroline in any census. This looks like Samuel in 1891,
1891 RG12/1530 f.38 p.30 Heigham, Norfolk
2 Distillery Street
Stables
Henry TILNEY Head M 51 Lic? Cab Propr Norfolk Kirby Bedon
Mary Ann " Wife M 50 Suffolk Bramfield
Samuel J BIX Nephew 13 Scholar Norfolk Norwich
Oooh....I think I've just found proof

Looking at Samuel's Army records it says his mother is Caroline HUNT, 125 Grundy? St, Poplar, the same address that Caroline is living at in 1891 and 1901

Maybe Samuel decided to take his stepfather's name of HUNT then changed his mind and went back to RIX, unfortunately the reasons why will probably remain a mystery.
Regards,
Daisy