I also had a problem due to missed spelled surnames , but knew the twon our family was from. I did a quick search for the you below at Ellis Island, which worked for me, please give it a try. As stated in a previous reply the other two websites did help me as well.

To help search for the misspelled ...

Searching for ancestors of Francesco Mazzei born abt 1840 of Cassono allo Ionio, 5 children Amelia/Emilia (Married to Ferdinand Praino ), Angela (Married to Louis Villella ), Letizia (Married to Gaetano Garofalo ) Giuseppe (Married to Lucretia Celia ) Louis (Married to Theresa Falbo ). All 5 ...