The phrase "a faction of their" is correct and usable in written English.
It can be used when referring to a specific group or subset within a larger organization or community that shares common interests or goals.
Example: "A faction of their supporters has been advocating for a more progressive agenda within the party."
Alternatives: "a segment of their" or "a group of their".
After a U.S.-backed Ethiopian invasion disbanded them, in 2006, a faction of their militias called al-Shabaab, or "the Youth," rose up in response.
While Freddie Mac's stock is down more than 16percentt since Friday, its bonds have lost only a faction of their value.
Writing for Bahrain Mirror, Bahraini researcher Yousif Makki argued that the role of the Khawalid brothers was amplified and that they did not constitute a faction of their own.
"They can invest incredible resources into the political process that make so much of a difference in Washington, at the cost of a fraction of a faction of their haul".
Gayoom, the former leader, has fallen out with his half-brother and formed a breakaway faction of their party, making for bitter politics in Malé, at odds with the idyllic resorts a speedboat ride away.
"Today, those same Republicans have been driven away from the table by a small faction of their own party," he said.
OVER time, a faction of strikers, dubbed "ultras" by their companions because of their intolerance for dissent, gained the upper hand through nasty purges.
But it was also caught by a faction of people who will add their own emotional note to an already painful trial.
They were members of a faction of the A.P.C.; they claimed that their candidate had been violently shut out of a primary by another group.
In recent years he moved to North Waziristan, where he headed a faction of Punjabi Taliban fighters who used their base in the tribal area to orchestrate suicide bombings and kidnappings across Pakistan.
There was one catch in their work that has riled a faction of the economics profession.
