Finding the origin of your last name requires understanding the types of last names, the components that different countries and cultures use to create surnames, and how last names have changed over time. Genealogy websites, such as Ancestor Search, Ancestry.com, and Genealogy.com include search engines to find the origin and meaning of any last name in their database of surnames.
Definition of low-end product. A product that is one of the cheapest in a company's product range, or in the market as a whole. [1]
Low percent yield means that the amount product obtained from a chemical reaction/process is very little. It means your theoretical yield was higher than your actual yield. I'm not sure, but I think that means the substance is not very pure. mybe because some of the produt maybe left in the beaker.