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
whom of which
Grammar usage guide and real-world examplesUSAGE SUMMARY
'whom of which' is not a correct and usable phrase in written English.
Instead, you would use the phrase 'of which'. For example, you could say, "The author, of which I was a fan, wrote the book."
⚠ May contain grammatical issues
Table of contents
Usage summary
Human-verified examples
Expert writing tips
Linguistic context
Ludwig's wrap-up
Alternative expressions
FAQs
Human-verified similar examples from authoritative sources
Similar Expressions
60 human-written examples
During the observation period, 166 MCI converted to AD, 6 AD converted to MCI, and 19 NL evolved to MCI whom 3 of which subsequently evolved to AD. Intrinsically, the model considered that control subjects had CDR-SOB scores of zero which was in agreement with the observations.
The end result of a realist evaluation is a refined set of assumptions, namely, a refined PT, which provides information on what kind of interventions worked for whom, under which conditions and how.
Science
The end result of a realist evaluation is a refined set of assumptions a refined PT that provides information on what kind of interventions work for whom, in which condition and how.
Science
The bullpen, which has been dependable all year, saved the team again, along with the likes of Derek Jeter, Paul O'Neill and Bernie Williams -- each of whom homered, which is nothing new -- and David Justice, who launched his first homer as a Yankee.
News & Media
We describe a nosocomial outbreak of infection with a novel arenavirus involving 5 patients, 4 of whom died, which occurred in South Africa in September October 2008.
Science
But a funeral for whom, for the dead of which wars, whose wars?
News & Media
Without a clear basis, it was uncertain what was being claimed of whom, which left the patients' rights agenda open to co-option by other actors, most significantly the state, as seen in the production of the Department of Health Patient's charter in 1991.
Science
(The most notable exception: out-of-state employees of Boeing, whom BECU, which stands for Boeing Employees Credit Union, originally served exclusively).
News & Media
And he argued that Mrs. Bachmann's decision was "unjustifiable" because the United States requires naturalized citizens to take an oath that contains the line: "I absolutely and entirely renounce and abjure all allegiance and fidelity to any foreign prince, potentate, state or sovereignty, of whom or which I have heretofore been a subject or citizen".
News & Media
However, to become a US citizen, Mensch must state she will "absolutely and entirely renounce and abjure all allegiance and fidelity to any foreign prince, potentate, state or sovereignty, of whom or which I have heretofore been a subject or citizen".
News & Media
The oath taken by new citizens includes the words, I absolutely and entirely renounce and abjure all allegiance and fidelity to any foreign prince, potentate, state, or sovereignty of whom or which I have heretofore been a subject or citizen.
News & Media
Expert writing Tips
Best practice
Avoid using the phrase "whom of which" in your writing. It's generally considered grammatically incorrect. Use "of whom" or "of which" depending on whether you are referring to people or things.
Common error
A common mistake is to combine "whom" and "of which" when one or the other is sufficient. Ensure you're using the correct relative pronoun based on whether you're referring to persons ("whom") or things ("which").
Source & Trust
60%
Authority and reliability
1.2/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "whom of which" is generally considered grammatically incorrect and doesn't serve a clear grammatical function in standard English. The individual words "whom" and "which" are relative pronouns used to introduce relative clauses, but their combination in this specific order doesn't form a valid construction. Ludwig AI confirms that it is not a correct phrase.
Frequent in
Science
0%
News & Media
0%
Formal & Business
0%
Less common in
Science
0%
News & Media
0%
Formal & Business
0%
Ludwig's WRAP-UP
In summary, the phrase "whom of which" is generally considered grammatically incorrect in standard English. As Ludwig AI explains, it's not a correct and usable phrase. The individual words "whom" and "which" are relative pronouns, but their combination in this order doesn't form a valid construction. It's advisable to use either "of whom" when referring to people or "of which" when referring to things. Due to its ungrammatical nature, this phrase is inappropriate for any formal context and should be avoided to maintain clarity and credibility in writing.
More alternative expressions(10)
Phrases that express similar concepts, ordered by semantic similarity:
of whom
Specifies a subset of people from a larger group.
of which
Refers to a subset of things or ideas from a larger group.
among whom
Highlights individuals within a group.
among which
Highlights items within a set.
from whom
Indicates the source of information or action from people.
from which
Indicates the source or origin of something.
to whom
Specifies the recipient of something (usually a communication).
to which
Indicates the object or target to which something is directed.
whose
Shows possession or association with a person or thing.
whereof
Indicates 'of which' in a more formal or archaic style.
FAQs
When should I use "of whom" vs "of which"?
Is "whom of which" grammatically correct?
No, "whom of which" is not considered grammatically correct in standard English. It's best to rephrase your sentence using either "of whom" or "of which" depending on the context.
What's a simple way to avoid using "whom of which"?
You can often rephrase the sentence to use "whose" or a possessive construction. For instance, instead of trying to use "whom of which", consider using "whose" to show possession or relationship.
Can I use "that" instead of "whom" or "which" in phrases like "of whom" or "of which"?
While "that" can sometimes replace "which" in relative clauses, it's generally not appropriate to use "that" in place of "whom" after a preposition like "of". Stick to "of whom" for people and "of which" for things.
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
60%
Authority and reliability
1.2/5
Expert rating
Real-world application tested