Herman was a Polish Jew, can't find him on 1901, BUT this doesn't really help with the marriage cert for 1930
LM - for info. 1901 census has him as Henry but on original it's altered to Herman
Henry Hardy Head Tailor b Poland (Russia)
Rosy Hardy Wife b Poland (Russia)
Arnold Hardy Son b Leeds, Yorkshire
Maurice Hardy Son b Leeds, Yorkshire
Lily Hardy Daughter b Leeds, Yorkshire
Beatie Garlow Domestic Nurse b Leeds
1901c RG13 Piece 4226 Folio 116 Page 10
and
1911 c https://www.familysearch.org/ark:/61903/1:1:XWVS-S7H54A
Sheepscar St Leeds, Leeds
Herman Hardy is widowed two further children Cissie age 6 &
Ruby age 2
Edit to add
Certificate of naturalization Herman Hardy 54 Sheepscar Street Leeds occupation tailor
Birth place Gombin Warsaw
Ruby is mentioned one of the 5 children
HARDY, ARNOLD
mmn ALTMAN 1897 J Quarter in LEEDS Volume 09B Page 427
HARDY, MORRIS mmn ALTMAN
1898 S Quarter in LEEDS Volume 09B Page 446
HARDY, LILY mmn ALTMAN
1901 J Quarter in LEEDS Volume 09B Page 436
I wonder if Cissie was a pet name and her birth registered as Sarah
HARDY, SARAH mmn ALTMAN
1904 D Quarter in LEEDS Volume 09B Page 455
1908 RUBY HARDY’s birth posted by LM mmn ALTMAN - see reply 4
Edit to add
apologies to Rosie17 for duplicating I didn't see your 1901 census post