Matt Baker: Fyi, the above chart was actually just a simplified promo for a much larger chart – a Writing Systems of the World poster. So, if you’re concerned about the fact that thorn, wynn, or any other letters are missing, rest assured that they were indeed included on the main chart.
“Shouldn’t you have titled this ‘Evolution of the Latin Alphabet?'” Well, yes, that would have been correct as well. But it’s also not incorrect to refer to an “English alphabet”. Obviously, many European languages use the same Latin script. But some use a slightly different number of letters. When one is referring to the set of Latin letters used for a particular language, it’s ok to refer to that set as the “[language name] alphabet”. — Matt Baker / UsefulCharts.com