In 1873 a man named Habbe Agena immigrated to the United States with my ancestor Fokke Goldenstein. The two 16 year olds are listed adjacent to each other on the manifest and I assumed they knew each other before immigration. Easy searches didn't locate Habbe and I went on to other things.
When manually searching church records in Hancock County, Illinois, in the 1890s for Fokke's children, there he was Habbe Agena. I don't know it's him, but the name combination is fairly unusual.
It always pays to keep your eyes "open" for those lost people. Twenty years after their immigration together, the men are neighbors attending the same church.