Tillie/Tilly is shortform for Mathilde/Mathilda.
is not only from Galicia.
Diminutive of MATILDA
VARIANTS: Mattie, Tilda, Tillie, Maudie
OTHER LANGUAGES: Til (Dutch), Tilda (Finnish), Tilda (Swedish)
but Waschkau is really not an "austrian" name. orgin more of Germany´s north, so also can have been from East-Prussia like Ellisisland shows with Königsberg, now Kaliningrad, Russia:http://www.ellisisland.org/search/matchMore.asp?LNM=WASCHKAU...
ZlaticaBeca you can be right - maybe also people with that name in former Galicia and surroundings, so then would have been Austria that time.