I've worked on a family tree for the Arcuris who lived in Quebec and New York but I'm unable to see where the Toronto area–based Giacinto Arcuri, the subject of this thread, fits.
Giacinto Arcuri is likely not a first cousin to Bonanno member Domenico Arcuri of the Montreal area who died under bizarre circumstances in 2012 in Broward County, in Florida -- I'll refer to Domenico as Domenico Arcuri Sr. in this post. I haven't found a common ancestor yet. I've been able to rule out they had the same paternal grandfather. I don't have enough information to know whether they had the same maternal grandmother.
Giacinto's father's name was very likely Emanuele, and Domenico Arcuri Sr.'s father was definitely the Domenico Arcuri who was born 1900 and died 1933. The older Domenico Arcuri (1900-1933) was born to Giuseppe Arcuri and Giovanna Alfano -- Bronx-based Bonanno member Giuseppe Arcuri (September 30, 1921-June 11, 2001) was named after this paternal grandfather, Giuseppe. (Recall that there has been speculation that Domenico Arcuri Sr.'s wife, Carmela/Carmelina Alfano, is believed to be related to longtime Bonanno member and one-time consigliere Nicolino/Nicholas/Nick Alfano. I've wondered whether Arcuri Sr.'s wife might be a relative instead. There may also be other Alfanos in the family tree via Arcuri Sr.'s mother's ancestors.)
Arcuri Sr. of the Montreal area had a brother named Giacinto who died in 2003. This Giacinto in the Montreal area was born in 1923 and was married to Rosa Zambito, who was born around 1931 and died June 30, 2011. The mother of Arcuri Sr., the Giacinto in the Montreal area, and Giuseppe in the Bronx was Filippa Arcuri (1904-1990) -- it was from Filippa's parents (Giacinto Arcuri and Giovanna Guaragna) that B. and I were able to figure out that her brother was the Rosario Arcuri (born around 1896; died August 20, 1934) who was involved in the murder of Vito Rizzuto Sr. (father of Nick Rizzuto Sr., killed November 2010).
I'm going to share in my very next post in this thread, via Evernote, an image of a record I found through Ancestry. I originally had planned to create a new thread about the record -- I still can -- but I see no reason not to post in this thread imminently. Stay tuned.