Last name בלך (Blech 
, בלך 
, Blehs 
) , globally, is quite a rare surname. The cognomen בלך is habitual in Germany, where it is quite a rare surname, Israel, and France, where it is a rare surname. Not in comparison with a country's population, it is commonest in Germany, the United States, and France. Much less frequently, בלך is the forename as well as the last name.
משה, בלה, רחל, קטי, אסתר, ילנה, מיכאל, שמואל, יונתן בנימין, and ראובן חיים