Gąsienica is a Polish-language surname common among the Goral population of Zakopane region literally meaning "caterpillar".
[1][2] The commonality of this surname is reflected in the following question-answer joke: "Why does cabbage not grow in Zakopane?
– Because there are too many Caterpillars!"
For the same reason Gorals use double-barrelled names, for better identification.
[3]