How many countries in the world that are known by separate English names?

This is a tricky question! There's no definitive answer because it depends on how you define "separate English names".

Here's why:

* Official vs. Common Names: Some countries have different official and common names in English. For example, the official name is the "Republic of Korea" but it's commonly known as "South Korea".

* Historical Names: Some countries have historical names that are still used in English, even if they are no longer officially recognized. For example, "Burma" is the historical name for Myanmar.

* Regional Variations: Different English-speaking regions might use different names for the same country. For example, some people in the UK might refer to "The Netherlands" as "Holland".

So, to answer your question:

* If you're looking at official English names, there are likely hundreds of countries, as most have their own official names.

* If you're looking at commonly used English names, there are likely fewer, as some countries are commonly known by the same name.

* If you're considering historical or regional variations, the number could be significantly higher.

It's more important to understand the context of the question and how you're defining "separate English names" to provide a more accurate answer.