She is known to me.
Она известна мне.
known as karma.
известным как карма.
It is well known
Known as Pip?
Известный как Пип?
known to everyone - всем известный
is widely known as - широко известен как
it is well known - хорошо известно; общеизвестно
known beforehand - заранее известный
well-known: A well-known person or thing is known about by a lot of people and is therefore famous or familiar . If someone is well-known for a particular activity, a lot of people know about them because of their involvement with that activity.
familiarly known as/familiarly called: If you say that something or someone is familiarly known as a particular thing or familiarly called a particular thing, you are giving the name that people use informally to refer to it.
for reasons best known to oneself: If you do not know why someone did something, you can say that they did it for reasons best known to themselves. You usually use this expression when you do not agree with what they did.