because why? what´s difficult?
austrians learn english at school, so ask in your language if the person was registered at the time you think. maybe better for first in Seefeld. when they lived there, als when child was born possible in Innsbruck i a hospital - it must have been registered living in Seefeld.
want you believe information from a person who supposedly lived there? does this person have saved "in the head" all people lived in Seefeld that time? don´t think so. official registry is better. Seefeld was not so big that time, an registry-entry think must be found also with the firstname.
make attempt an dlook what happens.