Kaarina, there are couple items missing on Paul's WWII Draft.... b Turko, Finland Person who will also know where you are: William MATTSON, Julia St, Berekeley, Alameda Co CA This maks me believe he was not married, or had children.
1940 Ft Bragg, Mendocino Co CA; Paul W MATSON49 Finland, laborer, saw mill.It says married, but looks like it is crossed out.He had lived in the same place 1935; was a lodger, along with many others. 1930 he was in the same location, single, same occupation; emigrated 1910, and was not a citizen.
WWII Draft Reg, Alameda Co CA William MATTSON, Julia St b. 5-22-1887 Finland Wife: Lilly
He is also listed WWI Draft Reg, with same wife. He d 4-6-1954 Berkeley, Alameda Co CA Mother: SWANSTROM Father: GUNSBEAK [should this be KUNGBACKA...the names look very similar]
1930 Berkeley, Alameda CA MATTISON William 48 Finland; carpenter; emi 1905 Lylly 39 Finland; emi 1902 Leo 18 MN son [d 11-10-1993, parents not listed, but Lillie's maiden name may be YOKINEN]
I'm not familiar with the patrinomic naming system in Finland.