Hello Marie Joyce,
Being a relative of the "Joyce" family (born Joyce) in Victoria, Australia, I can empathise with you.
It can indeed be confusing, especially when the males took on the same name as their paternal father or grandfather and just mixed it around. eg. Thomas Michael Joyce, Michael Thomas Joyce etc.
I noticed in the "Joyce book" Co. Donegal to Winton, (which is in Victoria, Australia) Author's name Carolyn Joyce.
Isbn no:0-646-646-41029-6 (book no 37 of 200)
For part of the tree, Ralph Joyce and his wife Mary (Middleton) boarded the Castilian Ship as free people late 1856 or early 1857 and emmigrated to Australia with 4 of their children, William, 36, Thomas 23, Sarah 28, & ELiza 26 & their 12 year old grandson and nephew John McMonigle. It is stated in the book to appease the authorities to board the ship they may have changed the ages to gain permission to travel.
Shipping documents (Assisted Bounty Immigrants to Port Phillip 1839-1871 - Book 11)
Wishing you all the best in your family journey.
Kindest Regards, Jenn Hornstrand
(ne: Jennifer Anne (b:Joyce) Hornstrand
Living in Riddell's Creek, Victoria, Australia - 23rd, Feb, 2022