£ASZCZKOWSKI: They don't come much rarer! Only 2 people in all of Poland are named £aszczkowski and both live in West Pomerania (Szczecin area), so the Ukrainian connection may be right on. (That's one of the recovered lands to which Poles stranded in the Soviet-annexed eastern half of prewar Poland were repatriated.)
MICEWICZ: Micek, Micu¶, Miku¶, etc. are all hypocoristic forms of Mikołaj (Nicholas); the
-wicz ending is always patronymic so Micewicz probably originated centuries ago to indicate 'Nick's boy'.
ZDYBOWICZ: root-word zdybać (to catch someone red-handed); some village snooper or the local constable known to spy on people and catch them in the act might have been nikcnamed Zdyba, Zdybek, etc., and the son such a one fathered would have received the patronymic tag Zdybowicz.