I am desperately trying to find out about my step fathers family but I'm stuck with his grandmother:

Alice Mary Elizabeth Holding Born 1887.

Here is what I know:

According to the 1911 census she was born in Kingsland, Middlesex.

She married Sydney Howell (b. 1881, Edmonton, Middlesex, UK) in 1907 in Edmonton, Middlesex, UK.

Her father was Henry Holding who was a House decorator.

She had 12 children with Sydney (All born in Edmonton, Middlesex, UK):

Sydney Henry J Howell
b. 1907

Elizabeth Alice Howell
1909

Daisy Florence Howell
2 Mar 1911

Stephen V A Howell
1913

Vincent A C Howell
1915

Albert K E Howell
1916

Winifred A A Howell
1920

George A W Howell
1920

Walter R Howell
1921

Cyril Percy R Howell
18 Aug 1922

Irene D Howell
1923

Gladys C Howell
1924

I would love to find out about her parents, any aunts and uncles. And if anyone has any information on any of her children mentioned in this post I would be grateful for any information you have.

Thanks in advance for your help!