敖克寒 or 敖寒 is also OK. 敖(ao2)is a traditional chinese family name. 克(ke4) is a word expressing your position in the family hierarchy. and 克's chinese meaning is overcome or surmount. but it can save in spoken chinese as usual.寒(han2) chinese meaning is cold or chilliness, It's very familiar in chinese name.
顶风傲雪,不畏严寒.