Used and loved by millions
Since I tried Ludwig back in 2017, I have been constantly using it in both editing and translation. Ever since, I suggest it to my translators at ProSciEditing.

Justyna Jupowicz-Kozak
CEO of Professional Science Editing for Scientists @ prosciediting.com
known to someone
Grammar usage guide and real-world examplesUSAGE SUMMARY
The phrase "known to someone" is correct and usable in written English.
It can be used when indicating that a particular piece of information or fact is familiar or recognized by a specific person or group. Example: "The details of the project are known to someone in the management team."
✓ Grammatically correct
News & Media
Science
Wiki
Alternative expressions(20)
widely understood
known to planet
known to mankind
widely recognized
known to humanity
known to nature
accessible to a person
recognized by civilization
universally acknowledged
known to everyone
generally accepted
known to sort
known to male
known to folk
known to public
known to individual
common knowledge
known to civilization
known to crowd
known to history
Table of contents
Usage summary
Human-verified examples
Expert writing tips
Linguistic context
Ludwig's wrap-up
Alternative expressions
FAQs
Human-verified examples from authoritative sources
Exact Expressions
8 human-written examples
"The idea is that in a school, every single kid has to be known to someone.
News & Media
They are in love, but they can't stand the agony that love requires: being known to someone other than yourself.
News & Media
"We wanted some people who weren't so well known to someone like Sarah Silverman, who's in her moment right now".
News & Media
Mandatory rotation would let that auditor know that such compromises would become known to someone who had nothing to lose by questioning them.
News & Media
Even the financial crisis was entirely predictable, although the exact course of events could not be known to someone who lacked access to the information held by central bankers.
News & Media
It can be usefully contrasted with the claim of responsibility following the attacks in Paris, which included details that could only be known to someone intimately involved in the planning.
News & Media
Human-verified similar examples from authoritative sources
Similar Expressions
51 human-written examples
For example, one survivor said, "And I know to someone who is healthy and never had to deal with that, that's a scary thing.
Science
Teach something you know to someone else.
Wiki
defer.add img); Teach something you know to someone else.
Wiki
Having the opportunity to get to know someone, to be let into their heart and soul, is a powerful thing.
Wiki
But you had to "know someone" to get it.
News & Media
Expert writing Tips
Best practice
Use "known to someone" when emphasizing that a particular piece of information or skill is possessed by a specific individual or group, highlighting their unique awareness or expertise.
Common error
Avoid overusing the passive construction "known to someone" when an active voice would be clearer and more direct. Instead of "The answer is known to her", try "She knows the answer".
Source & Trust
88%
Authority and reliability
4.1/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "known to someone" primarily functions as a passive construction emphasizing that information or a fact is recognized or understood by a specific individual. As Ludwig AI indicates, this construction appears in various contexts, serving to highlight particular awareness or expertise.
Frequent in
News & Media
50%
Wiki
21%
Science
29%
Less common in
Formal & Business
0%
Encyclopedias
0%
Reference
0%
Ludwig's WRAP-UP
In summary, the phrase "known to someone" is a grammatically correct expression used to indicate that a piece of information or a fact is recognized by a specific individual or group. As Ludwig AI indicates, while not extremely common, the phrase appears in various contexts, particularly in News & Media and Science. When writing, it's important to consider whether an active voice construction might be clearer and more direct. Alternatives such as "familiar to a person" or "recognized by an individual" may also be appropriate depending on the context. The phrase fulfills a useful purpose in specifying the possessor of knowledge, drawing attention to who is informed about a particular subject and can be used in professional writing.
More alternative expressions(6)
Phrases that express similar concepts, ordered by semantic similarity:
familiar to a person
Replaces "known" with "familiar", emphasizing personal acquaintance or awareness.
recognized by an individual
Substitutes "known" with "recognized", highlighting acknowledgment or awareness.
within someone's knowledge
Focuses on the information being contained within a person's understanding.
apparent to somebody
Replaces "known" with "apparent", suggesting the information is easily noticeable to someone.
privy to someone
Indicates that someone is part of a private or secret understanding.
on someone's radar
Emphasizes that someone is aware of something or someone, often in a professional context.
accessible to a person
Highlights that the information or entity is reachable or obtainable by an individual.
in someone's consciousness
Emphasizes awareness and recognition of something or someone.
registered with someone
Suggests that something has been officially noted or recorded by someone.
noted by a person
Implies that an individual has taken specific notice of something.
FAQs
How can I use "known to someone" in a sentence?
You can use "known to someone" to indicate that a specific person or group is aware of something. For example, "The details of the plan are only known to someone within the inner circle".
What are some alternatives to "known to someone"?
Alternatives include "familiar to a person", "recognized by an individual", or "within someone's knowledge" depending on the context.
When is it appropriate to use "known to someone" instead of "familiar to someone"?
"Known to someone" is appropriate when you want to emphasize the state of being recognized, while "familiar to someone" highlights a sense of personal acquaintance or understanding. The choice depends on the specific nuance you want to convey.
Is it grammatically correct to say "details known to someone"?
Yes, "details known to someone" is grammatically correct. It uses a past participle ("known") as an adjective to describe "details", indicating that the details are recognized or understood by a particular person.
Editing plus AI, all in one place.
Stop switching between tools. Your AI writing partner for everything—polishing proposals, crafting emails, finding the right tone.
Table of contents
Usage summary
Human-verified examples
Expert writing tips
Linguistic context
Ludwig's wrap-up
Alternative expressions
FAQs
Source & Trust
88%
Authority and reliability
4.1/5
Expert rating
Real-world application tested