There are a few good published Genealogies available for free online for researching your Tiffany lineage, They are;
1. "Tiffany's of America. History and Genelogy" by Nelson Otis Tiffany
https://archive.org/details/tiffanysofameric00tiff
2. "Genealogical Sketch of the Tiffany Family" by Ella F. Wright
https://archive.org/details/genealogicalsket1904wrig
3. "The Tiffany's of New York State 1800-1940" by Jane babcock hacker
https://dcms.lds.org/delivery/DeliveryManagerServlet?from=fhd&dps_p...
If you are having difficulty finding your Tiffany Ancestors please contact me and I'll see what I can do. I spend a lot of time perusing different lines and I may be familiar with your lineage and your ancestors . Also, if you're on Facebook please consider joining a group I set up specifically For Tiffany's and their descendants to help develop and chronicle, Tiffany genealogy. The Facebook group is called the "Tiffany Family Genealogy Project" My Geni profile is under the name "Jeffery C. Tiffany" ...and here is the FB group link.. https://www.facebook.com/groups/1361998263856789/?ref=bookmarks
Note: It's pretty common for new users to input their entire trees onto Geni. For the most part the Tiffany's are a well documented clan on Geni. Please do a quick Geni search on your ancestors to ensure they're not already on Geni, especially ones that pre-date, circa 1800. This will prevent duplicate profiles and a lot of extra work for the Curators.