Hi,
Thanks for taking the time to post your question, hopefully, there are some Fitzgeralds among our members!
There is a post on the Fitzgerald name here on the community
family crest series that you may be interested in too.
Ancestry.com has some interesting information on immigrants to the US in the 1800s, many would have arrived without details being recorded in the early years. There are some websites that have passenger lists, The
Irish Emigration Database,
RootsIreland, and
Find My Past all have details of places to look for any records.
Do you have any information on your own ancestors and their journey to the States?