Ron, I didn't intend to throw in a monkey wrench. There are two totally unrelated items regarding Slovenia that I perhaps mentioned too close together.
My DNA test through Ancestry.com indicated an Eastern European origin, specifically the area now known as Slovenia. However, in their closest living relative data all they came up with was a person with whom I shared a "most recent common ancestor" some 26 generations back. Of course, the possibility of finding an ancestor or relative in the DNA database is limited to those persons who actually have taken the test.
What I really was basing all this on was my birth certificate identifying my father as one Robert Adams, at an age that closely matches the son of this Anton Adams in Roslyn, Kittitas County, Washington. On their census info the birthplace for both Anton and Mary are listed as "Austria (Slovenian)". That just lit up a signal for me.
If this family is actually mine, that would easily explain why there are no other more recent persons showing up here in the U.S. or in any of my previous "Adans" searches in censuses, etc. The Washington State location is another anomaly, as my father was supposedly from Idaho or Oregon, not Washington.
Again, the only info I have is from the certificate, which already includes several errors that are known to me.
Anyhow, thanks for the assistance. I'm aware of the possibility of a two-stage immigration.. In the case of Anton, it is likely that his port of departure was Trieste, Italy. Very close to his birthplace and residence in Austria (Slovenia).