Many thanks for this.
I can tell you that Eve (Evelyn) Gertrude eloped with an Austrian cavalry officer, was cut off by her father, became Eve Brandeis-Weikersheim and subsequently lived in Vienna until forced to return to England in 1938 to escape the Nazis. She had one surviving child, a daughter, but did I believe separate quite early from her husband Hermann as she rather liked the high society life of the Viennese upper middle classes, and he was a renowned bore!
Isidore lived at The Grange in Ellistown, Walter became a solicitor and Albert a barrister.
Joseph Joel-Ellis started his career in London as a jeweller at 49 The Strand, and subsequently had three decently prestigious London addresses at various times, once he had got into the mining industry: can't find right now the first one, in South Kensington, but the second was The Grange near what is now South Kensington station, (he probably got it cheap because the plans for the underground must have been underway and it was demolished) and the third was 51 Portland Place and is now the Chinese Embassy. He was then listed as Col Joseph Joel Ellis, Consul General for Persia, so he didn't do too badly!
I have been trying to work out the relationships of the previous generation and where the family had originally come from. I have traced Joseph Frederick Joel-Ellis (or The Colonel as he was known) and his parents back via Ireland and Bristol to Krotoschin (now Posen) in Bohemia. His parents were called Pessa and Isaiah Joel.
The name of Joel-Ellis was formed by deed poll in 1863. He died in London in 1885 and there is an obituary in The Jewish Chronicle and The Lady (!). My interest is in the lateral connections that must be Lewis Joel and Sarah Joel - very likely a brother and sister. I also want to find out where the ELLIS name came from i.e. was it taken on as a compliment to a family who had helped him into the coal business or something. There was certainly a connection with Ellis and Everard the manufacturers of sanitation/drainage pottery, bricks and pipeware, nationalised in the 1960s.
The Colonel's wife was called Marguerite nee Nathan and brought a Latin American connection, hence Walter's second name. She may have been born in Brazil or Peru.
Of course one of the things that makes it interesting and a little harder to research is that the family was Jewish. That's possibly another reason for taking on an extra English sounding surname, particularly as he did end up with honorary diplomatic positions.
Hope you find this of use.
What is your interest in this family? I can write up the things I have more clearly if you are interested and can add some more detail.