The phrase 'relation to whom' is correct and usable in written English.
You can use the phrase when you want to refer to someone in a family context. For example, "She was looking for her long-lost cousin, but had no idea of his relation to whom."
He was merely the unfortunate soul in relation to whom the words "fucking black cunt" arose on the football pitch.
It's always tempting to render pop as taxonomy – who fits where, in relation to whom; and what it is that specific genre choices say about their adherents.
Their only child was an adopted son, Jean-Marie, the relation to whom may have inspired Marcel's later reflections on "creative paternity" and the spirit of adoption.
The Fisher's exact test values show that the content of what data has no statistically significant effect on disclosed behaviour in relation to whom data, while the content of whom data has a statistically significant effect on disclosed behaviour in relation to what data.
The issue then arose as to whether his comparator was a Lewisham tenant who had not sublet his flat (in relation to whom Mr Malcolm could argue that he had been less favourably treated because of his disability) or someone without a disability who had sublet his flat.
The police failed, for example, to contact Taylor's legal adviser, even though they had transcripts of voicemail taken from her phone; or Coulson himself, who had been hacked by his own private investigator, and in relation to whom the evidence was sufficiently clear that Scotland Yard contacted him within 24 hours of the story being revived last year.
And now I find myself thinking of Norman, Jack and their parents frequently; it is as if I have finally met relations – to whom I owe so much – that I have always half-known.
The public relations man to whom Mr. Trump referred is John Scanlon of Daniel J. Edelman Inc., who was hired on Friday to represent Mrs. Trump.
Mr. Balson and Frances Lear, the magazine's founder and editor in chief, "parted amicably," according to Howard Rubinstein, the public relations executive to whom questions about the magazine were referred yesterday.
But on the other hand they ignore that many U.S. friends and allies, with whom we not only have diplomatic relations but to whom we provide taxpayer aid and military aid, do not come close to meeting this standard.
When the kidnap plot goes awry and the wrong person is taken hostage, Plarr is forced into a devastating re- evaluation of his own life and of his relations to Clara, whom he doesn't love, and to Charley, whom he has betrayed with possibly fatal consequences.
