I could fine no Athanasios Ioannou in Alaska, unfortunately. I tried variants of the last name spelling, also, and looked just for Ioannou, with any other name, as well.

No Athanasios given names were listed in Alaska at all, for the years the census is available to me, which are 1900, 1910 and 1920. The 1930 census is not yet available online to me.

I did find this, though:

ATHANASOPOULOS APOSTOLOS (last name unknown), age 40, M, I , GREE, AK ,2-DIVISION, NOATAK & KOBUK, SELAWIK ,1920 , manager of the trading company/trading post at Selawik Village. He was a naturalized American Citizen, naturalized in 1905, after coming to America apparently in 1897. You should be able to get his nat papers from this info.

Did Athanasios ever use any other name, either first or last, that you are aware of? For example, my husband's greatgreatgrandparents in Greece were originally named Koutellas, or Koutelas, but their children, and all their children's children, as well as all the family born here in the US, were named Pikos.

The story is, one of the family was an outlaw (or at the very least, wanted by Turks), and all the other lawabiding men were stone wall builders and carried little pickhammers, so when they wanted to differentiate themselves from the bad guy, they used the name of the hammer, thus the new last name of Pikos.

Also, my husband's father's first name was Anastasios, because he was born on Greek Easter, but the name, which means "resurrection", has variants of Athanasios, Athanasis and others, too.

Do you know of any family story about name changes that I can follow up?