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
a certain one of
Grammar usage guide and real-world examplesUSAGE SUMMARY
The phrase "a certain one of" is correct and usable in written English.
It can be used when referring to a specific item or individual among a group, often when the exact identity is not important or is unknown. Example: "I spoke to a certain one of the committee members about the upcoming project."
✓ Grammatically correct
News & Media
Science
Wiki
Alternative expressions(1)
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
3 human-written examples
It's not a coincidence that the same day Baig was dunked in water, he had also given three dubious LBWs against England, and turned down a certain one of their own.
News & Media
The stem based methods look at motifs as a certain (one of three) combination of stems with a purely secondary structure based focus.
Science
If you're unsure about what your profile looks like to a certain one of your friends, you can check it out by clicking "View As... ...... on the right hand side of your profile.
Wiki
Human-verified similar examples from authoritative sources
Similar Expressions
55 human-written examples
Banville's words appear in the mouth of a certain Shawn Bawn, one of many Dublin literary grandees guyed here; Colm Tóbleróne is another.
News & Media
Furthermore, past a certain age, one of the classic symptoms of adolescent anorexia -- loss of menses -- doesn't apply.
News & Media
"It was a question of how directly you could tie it to a certain place," one of the officials said.
News & Media
At a certain point, one of the guard dogs attacks Alison.
News & Media
She had to be seen to be, to a certain extent, one of the boys," noted Clark.
News & Media
In an introductory passage, he explains: "I was a cog in his machine for a certain period, one of many cogs, that and nothing more".
News & Media
At a certain point one of the individuals, named Mary, decides to take a costly perfume and anoint Jesus' feet and hair.
News & Media
As an actress whose spent years reading scripts featuring Hispanic women of a certain age, one element of the scene felt wrong.
News & Media
Expert writing Tips
Best practice
Use "a certain one of" when you want to indicate a specific item from a group without necessarily revealing its exact identity, especially when the identity is unimportant or unknown.
Common error
Avoid using "a certain one of" repeatedly in close proximity; it can make your writing sound stilted or overly formal. Opt for simpler alternatives like "one of" or "a particular one" for better flow.
Source & Trust
86%
Authority and reliability
4.1/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "a certain one of" functions as a determiner phrase, specifying a particular member from a group without providing explicit identification. Ludwig examples show its use in various contexts to indicate an unspecified but definite element.
Frequent in
News & Media
50%
Science
33%
Wiki
17%
Less common in
Formal & Business
0%
Academia
0%
Encyclopedias
0%
Ludwig's WRAP-UP
In summary, the phrase "a certain one of" serves to identify a specific item within a group without explicitly naming it. As Ludwig examples reveal, its usage spans across news, science, and general contexts. While grammatically sound, it is advisable to use it judiciously to avoid sounding overly formal. While Ludwig marks the entry as correct, it is a rare term and its most frequent presence is in News & Media. When choosing alternative phrases, consider the subtle variations in emphasis and formality.
More alternative expressions(10)
Phrases that express similar concepts, ordered by semantic similarity:
a particular one of
Emphasizes the distinctiveness of the selected item.
a specific one of
Highlights the precision with which the item is chosen.
one particular of
Reorders the phrase while maintaining similar meaning.
one specific of
Reorders the phrase while maintaining similar meaning.
a designated one of
Implies a formal or official selection process.
one of those
Simplifies the phrase focusing on belonging to that kind
a unique one of
Highlights the uniqueness of the item within the group.
an individual one of
Emphasizes the individual nature of the selected item.
a random one of
Highlights that the selected item was not picked purposefully.
some one of
Indicates a selection but is less precise.
FAQs
How to use "a certain one of" in a sentence?
Use "a certain one of" to refer to a specific member of a group without explicitly identifying which one. For instance, "A certain one of the committee members raised concerns about the budget."
What can I say instead of "a certain one of"?
You can use alternatives like "a particular one of", "a specific one of", or simply "one of" depending on the context.
Is it more formal to use "a certain one of" compared to "one of"?
"A certain one of" can add a slight degree of formality or emphasis compared to the simpler "one of", but the difference is often minimal and context-dependent. Overuse might make the writing sound affected.
When is it appropriate to use "a certain one of" versus "any one of"?
"A certain one of" implies you're referring to a specific item, even if you don't name it. "Any one of" suggests that any item from the group would be suitable or acceptable.
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
86%
Authority and reliability
4.1/5
Expert rating
Real-world application tested