Here are a couple of items to consider, I am sure that others will chime in.
1) All Browning Hi-powers are made by FN of Belgium, recently assembled in Portugal. The commercial pistols for US sale will be marked Browning, but they are all made by FN. Don't worry about Belgium or Portugal, they are all very well made.
2) FEG made some clones in Hungary, and some of them are very close to the FN. Some FEG pistols were actually made with counterfeit FN markings. However, not all FEG "Hi-powers" are FN clones, some are internally different, similar to the S&W 39/59 series. Thus it is important that you know what to look for, and jaypee on this forum has published a book on the subject that you can find here: http://smile.amazon.com/gp/product/...eg hi-power&qid=1458076761&ref_=sr_1_1&sr=8-1
3)There are also Argentine FM models, and they are very similar to the FN ones, but there are also some variations, such as the shorter (think Commander) Detective models. These are highly valued.
4) There have been a number of Israeli surplus pistols on the market recently, some good and some pretty rough. Most of them clean-up pretty well and make good shooters.
As has been said, they tend to multiply, so beware.