Diana, Much of today's Romania was part of Hungary prior to 1919. Wolf in Hungarian is Farkas. Many people "Hungarianized" their names, so you should look under the Ellis Island records for your Gradfather under both Farkas and Wolf. There were several Daniel Farkas arriving in the US from Erdely (Transylvania) whose ages would closely corresspond to your Grandfather's birth of 1860. He very likely changed his name back to Wolf upon arrival in the US. There are a couple of Daniel Wolfs returning from visits in Hungary, so he may have taken trips later on under his new / old name. Good luck.