My grandfather was Herbert ffoliot Acton b.1914; Dublin, Ireland.
His parents were Joseph Acton (abt.1860; Dublin) & Grace Dennisson (b.1874; County Sligo?). Grace was Joseph's 2nd wife after he was widowed, sometime before 1911, so my grandfather had several half brothers & sisters (possibly eight) who were quite a lot older than him. 3 of these were:
Ellie (Eleanor?) Acton b.1881; Dublin. Joseph Acton b.1882; Dublin. William Acton b.1884; Dublin.
I have no further info on any of these, but hope this might be of help. If anyone has anything further please let me know as I have come up against a dead end here.