A belated thanks for these names Slowhands

I'm trying to track Bertha

Could Bertha be a name thats derived from something else?

She is on a family photo which is in the gallery

with her parents Thomas and Fanny Willstead nee Savagar

siblings

George m Susan? Painter and decorator in Cinderford daughter Ethel living in Coleford

William died of Measels in his 30's

Florence m Benjamin Ireland

Albert m Florence Lily Roberts

<Bertha>

Edith m Thomas Burgham

Rumour has it that, she may have lived in a home somewhere
When her parents died the brother is given her money and its to be used for her care i think
but no one knows what happened to her?

Any help would once again be appreciated