There is a Jonas Teiberis from "Wilna" (Vilnius) on the Hamburg Passenger Lists, departing Hamburg on 13 Dec. 1902, bound for NY aboard the Belgravia (line 25). His destination was Brooklyn.
http://search.ancestry.com/iexec?htx=View&r=an&dbid=...In searching the arrival records for this ship (30 Dec. 1902), there are several Jonases but the Jonas above seems to match with line 25, indexed as "Jonos Terbstis" with nationality Russian but to me, looks like Jonas Teibatis. Passenger list shows he is from Wilna, Lithuania. His destination is a brother, "Kasis Teibeis" in Brooklyn.
http://search.ancestry.com/iexec?htx=View&r=an&dbid=...Try wildcards in Ancestry, or enter just the first 3 or 4 letters of the first and last names (KAZ, KOZ, KAUS, etc.)and you can pull up additional possibilities.
Do either Jonas or Isabel have obits that may have named siblings who were already here?