BUZZ,
If you mean ALL who have been in the Northumberland Fusiliers, then I think the answer is no.
I have means (books)of seeing all those who enlisted for 1914-1918 war in the Northumberland Fusiliers battalions that were known as the Tyneside Scottish and Tyneside Irish.
The regiment was raised in 1674 and after various names and formations became the Northumberland Fusiliers in 1881, then the Royal Northumberland Fusiliers in 1935, then in 1968 amalgamated into the Royal Regiment of Fusiliers.
Which bit are you after ?
Michael