Palka: from the root pal: from pal (stake, pale), palec (finger), palić (burn), pałać (desire) or palik (little stake, pale). 3381 people in Poland named Palka.
If similar Pałka: first recorded in 1433, from the same root word as Palka or pałka which means "truncheon", "baton". 11394 people in Poland named Pałka, mostly from Lesser Poland.
Are they polish, yes or no?
Secio: not Polish, sounds Italian.
Pamula: Polish, only 2 people in Poland use this name, no meaning in this spelling.
If spelled Pamuła: "prune soup" or "servant" in old Polish. 1955 Pamułas live in Poland, mostly in and around Kraków.
Hujar: Polish, from hojdać, hujtać in old Polish meaning "to swing", "sway", "rock (to sleep)." 14 people in Poland named Hujar.