Popular
means to be liked or admired by many people or by a particular person or group
Example
A: What makes her so special?
B: She is popular at school.
____________________________________________________
Famous
known about by many people
Example
A: What did you wish for?
B: I want to be rich and famous.
_____________________________________________________________
Well known
means to widely or generally known
A: Who is that?
B: That is John. He is well known for being mischievous
Popular
means to be liked or admired by many people or by a particular person or group
Popular＝大勢の人々に好かれている、慕われていること。
Example
≪例文≫
A: What makes her so special?
（彼女の何が特別なの？）
B: She is popular at school.
（学校で人気者なんだよ）
____________________________________________________
Famous
known about by many people
Famous＝たくさんの人に知られている。認知度が高い。
Example
≪例文≫
A: What did you wish for?
（何をお願いしたの？）
B: I want to be rich and famous.
（裕福で有名になりたいって）
_____________________________________________________________
Well known
means to widely or generally known
Well-known＝よく知られている、認知度が高い。
A: Who is that?
（あの人は誰？）
B: That is John. He is well known for being mischievous
（あれはジョンだよ。悪戯好きでよく知られてる）
If someone is notorious, they are widely and unfavorably known.
"John's notorious for kissing girls without asking them!"
"Mary's famous for having won an Olympic race as a teenager."
"It's common knowledge that frogs can't fly - they can only hop!"
もし誰かがnotoriousなら、それは悪名高いという意味になります。
"John's notorious for kissing girls without asking them!" ジョンは相手に許可なくキスすることで有名だ。
"Mary's famous for having won an Olympic race as a teenager." メアリーはオリンピックで優勝した10代として有名だ。
"It's common knowledge that frogs can't fly - they can only hop!" カエルが跳べないのは一般常識さ、彼らは跳ねるだけ。
If someone is famous, he/she is known about by many people. A famous person is talked about or written about in newspapers, on TV, and on the radio. It must be understood that famous people are not talked about only about the good things they do, but also about unfavorable things about them. However, in contrast, popular people are liked or admired by many people. It should also be noted that someone may be well known for the bad things he/she has done or does. Such a person can be described as being notorious.
So, you may say:
She is a very famous singer.
or
Our president is very popular all over the country.
or
My brother is well known for being an excellent artist.
or
He is notorious for being a sex pest.
famous は、たくさんの人によく知られていることを意味します。
a famous person は新聞やテレビ、ラジオに出るような人のことです。
famous peopleというのは、いいことだけでなく、良くないことについて有名な人でも意味するのでご注意下さい。
well-knownと言っても、悪いことでよく知られているのかもしれませんので覚えておいて下さいね。
悪いことで有名だったりよく知られている人のことは、 notorious といいます。
例文：
She is a very famous singer.
（彼女は有名な歌手です。）
My brother is well known for being an excellent artist.
（私の弟／兄はすばらしいアーティストとしてよく知られています。）
He is notorious for being a sex pest.
（彼はセクハラをすることで悪名高いです。）
This was a city famed for its hospitality to service
When we say that someone or something is "famous" we want to say that everybody knows about this person or thing. Celebrities, of course, are a good example of famous people. They are known by everyone because of the movies they have acted in.
"Famed" is another way of saying "famous" or "well-known". In this example, we want to say that the city was famous because of its hospitality to service.
Famous means that someone/something is well-known: for example, celebrities are famous.
Infamous and notorious mean someone/something is well-known but for a bad reason: for example, the Titanic is an infamous/notorious ship.
If you would like to know how you can describe something/someone that is extremely well known, you can refer to that thing/person as "famous" or "very well known." So for example, you can say "Selena Gomez is very FAMOUS and is known by people all around the world.".
ものや人について「すごく有名」と言いたいなら、これは "famous" や "very well known" で表すことができます。
例えば：
"Selena Gomez is very FAMOUS and is known by people all around the world."
（セレーナ・ゴメスはとても有名で世界的に知られている）
These three different adjectives can be used to describe that something is known by a large population of people depending on a region, country or throughout the world.
Example sentences :
- That monument is very well-known throughout the world.
- She is a very famous singer in Korea.
- H&M is a popular clothing store in Europe.
これらは、ある地域、国、あるいは世界中で「よく知られた」という意味を表す形容詞です。
例文：
- That monument is very well-known throughout the world.（そのモニュメントは世界的に知られています）
- She is a very famous singer in Korea.（彼女は韓国で有名な歌手です）
- H&M is a popular clothing store in Europe.（H&Mはヨーロッパで人気の衣料品店です）
Famous/ Infamous.
Well known.
Renowned
Firstly, the difference between famous and infamous is that famous is in a positive way, and infamous is generally in a negative way. So, batman is famous, and the joker is infamous. The other two are the same as famous, more or less.
I hope this helps.
Have a great day.
Will
英会話講師のKOGACHIです(^^)/
おっしゃられている内容は、
○○ is well known
「○○はよく知られている」
のように表現できると思います(*^_^*)
以上ですm(_)m
少しでも参考になれば幸いです(#^^#)
お困りの時は、いつでも気軽にご質問ください(^0^)/
★★どうぞよろしくお願いもうしあげます★★
see you soon♪
日本 
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