It is well-known to sb 还是It is well-known to for sb?

e well-known to sb.为某人所熟知
be well-known for sth.因为什么而出名
be well-known as sth.作为什么而出名
就这三个用法.
例：
Jay Chou is well-known to the younth.
周杰伦为年轻人们所熟知.
Jay Chou is well-known as a singer.
周杰伦是作为一名歌手而出名.
Jay Chou is well-known for his songs.
周杰伦是因为他的歌而出名.
楼上提到的by就是个典型错误,按正常被大家知道理解,被动该用by连接,但是known 这个词特殊,它后面用to连接,所以这也是经常考到的一个考点.

it is well-know that。。。就是为所有人所知，没见过有It is well-known to sb 的用法，It is well-known to for sb根本不靠谱，怎么会有两个介词呢？
如果非要用，我想应该是 It is well known by sb.

It is well-known to sb

It is well-known to sb为某人所熟知的
It is well-known for sth因为某事变得有名

It is well-known to sb为某人所熟知的
It is well-known for sth因为某事变得有名
没有It is well-known to for sb的用法!