You can find out when most of the Nater families immigrated to the United States. You can focus your search to immigration records dating from that era. Immigration records can tell you an ancestor's name, ship name, port of departure, port of arrival and destination.
Synonyms for Danger: danger (noun) endangerment, hazard, jeopardy, menace, ominousness, perilousness, risk, threat,
Synonyms: frighten, scare, alarm, terrify, terrorize, startle, panic. These verbs mean to cause a person to experience fear. Frighten and the more informal scare are the most widely applicable: The Count's mysterious warning frightened me at the time (Bram Stoker).