Holub rhymes with:
golob, golub, ballclub, caleb, galeb, golob, golub, mccaleb, arab, ballclub, bathtub, bernabe, bizub, caleb, carob, casseb, cherub, diab, galeb, golob, golub, hubbub, jacob, jacobe, jakab, jakob, kaneb, kassab, kosub, kozub, mccaleb, wachob
Holub sounds like:
halebopp, halevi, half, halfway, halifa, halve, helaba, helf, helluva, help, helvey, helvie, hilb, hulvey