Prothetic v in Czech

I wonder if the prothetic v found in common Czech before words starting with an o: oko - voko (eye), okno - vokno (window), on - von (he), etc., has a historic relationship with the v before i found in Ukrainian words such as in вікнo (vikno - window) and він (vin - he). It is interesting to note the v in Ukrainian appears in this case only before an i, but not before an o, as in the word oко (oko - eye).