Hello,
Have been putting my information into order for you.
My husband is related to John Arigho's daughter Elizabeth, born 1866. A sponsor at her christening was Peter Ceppi.
John also had a son William Henry born 1873, sponsor Siraphen Cappi.
Also, Quardeghini child's sponsor in 1877 was John's 1st wife Ellen!
Lovely to see these people being friends later in their lives, long after John's travels from Switzerland and Italy.
Am going to visit my local familysearch.com centre near me, to search the Caneggio church films for John's father Baptist and his wife Constanza's details.
John had a brother Louis (name also of my husband's father), who married, we think en route to Ireland, a French girl Leontine Lefebvre. She also pops up as Maria Estella and Ellen! Not sure of her birth date, could be 1846.
Looks from the website irishgenealogy.ie that there are still Arigho's in Dublin, would love to contact them.
May put a message on the boards.
Cannot offer you any more information, but my husband has a prayer book published by John Arigho of Dublin, which is lovely to have. Have also seen John's memorial on find-a-grave.com.
Will keep digging and see if I come up with anything of interest to you.
Kind regards.