Hi, There isn’t really a great way to merge two different trees in an online family site. If you're really interested in trying, I can tell you that it will be a little complicated. Firstly, you will have to export both your family trees to Family Tree Builder. Then you can use the export branch feature and export a specific branch from one family tree and then import in to another tree in the Family Tree Builder software. To do this, go to Family Tree Builder and import the first GEDCOM file (or open your existing family tree project if this is your basis for the merge). Then import the second GEDCOM file, using the ‘File>Import Gedcom’ option in Family Tree Builder. A wizard will open, asking you to select the GEDCOM you wish to import. In the ‘Configuration’ page in this wizard, there is an ‘Output’ section, which gives you an option to merge the new GEDCOM file into the previous project. Choose the Merge option and complete the wizard. Please note, that if there are duplicate people in the two GEDCOM files, they will remain duplicates and will not be consolidated, you will need to delete the duplicates manually. We intend to provide more advanced features for merging GEDCOM files and consolidating duplicates, in the future. Please let me know if you need further assistance. I would be happy to provide it to you. Best Regards, Esther / MyHeritage team