The phrase "a staunch friend of" is correct and usable in written English.
It can be used to describe someone who is a loyal and steadfast supporter of another person or cause.
Example: "Throughout the years, she has been a staunch friend of the environmental movement, advocating for sustainable practices."
Alternatives: "a loyal supporter of" or "a steadfast ally of".
& 38th St.--in the garment center--and McGovern proclaimed himself a staunch friend of Israel.
(The Westgate Mall, popular among foreigners, is owned by Israelis, and Kenya is a staunch friend of Israel).
He was a tireless advocate for education and higher education, and a staunch friend of the College of Staten Island and CUNY.
Kazuyoshi Kaneko, a staunch friend of the banks, might have taken over Mr Aizawa's role if he had not recently been appointed minister in charge of administrative and regulatory reform.
This shows that it pays to be a staunch friend of the U.S. in extending freedom and does not increase a nation's strategic importance to be America's political adversary.
What Russia can now offer is unclear; one analyst in Ulanbaatar says that Mr Putin's chief motive was to "bare his arse to the West".Mongolia has long been a staunch friend of the West as it has tried to keep from falling into either Russia's or, especially, China's orbit.
(Maria was said to have bedded Brando, and in her twilight years she was a staunch friend to members of the star's family during their legal troubles).
He is the same Major Metcalfe who proved such a staunch friend to the Prince of Wales at Fort Belvedere during the difficult abdication days, in 1936, and who stood up as best man the following year, when the Prince, reborn as the Duke of Windsor, married Wallis Warfield Simpson in Monts, France.
With the assistance of the gods, his son Telemaco and a staunch friend Eumete, Ulisse vanquishes the suitors and recovers his kingdom.
