Thanks Khorat for these details.
An you're right, he is on the Volksbund database. I tried "Holzel" and "Hoelzel", the latter was returning all Hölzel results in the former version of the DB. It is no more true, you have to type "Hölzel".
By the way there is a place calle Strba (as in my original note) about 15 km west of Poprad, Slovakia, as can be seen on the map below:
http://maps.google.fr/maps?hl=fr&xhr...rad,+Slovaquie