"beloved alumni" is correct and usable in written English.
You can use "beloved alumni" to refer to a group of people who have attended a school in the past and who are viewed fondly by the current student body. For example, "Our beloved alumni have continued to come back and support our school year after year."
The Swarthmore College community mourns the loss of its distinguished and beloved alumnus Walter Scheuer.
The Mailman School of Public Health is deeply saddened by the passing of Ronald H. Lauterstein, Class of '58, a beloved alumnus and esteemed member of the School's Board of Advisors.
The Yeshiva University family is saddened by the passing of a beloved alumnus of Yeshiva College, who was widely respected in the Elizabeth, NJ community.
The American Academy of Dramatic Arts mourns the loss of its beloved alumnus Tom Poston, AADA Class of 1947, a virtuoso performer whose comedic talents charmed audiences for 60 years.
The Mailman School of Public Health, Columbia University, is deeply saddened by the passing of Ronald H. Lauterstein, Class of '58, a beloved alumnus and esteemed member of the School's Board of Advisors.
Nancy Weiss Malkiel, Chair and the Board of Trustees The Woodrow Wilson National Fellowship Foundation, Princeton, N.J. $6$COUPER--Richard COUPER--Richard COUPER--Richardnity mourns the passing of loyal and beloved alumnus, former vice president, acting president, provost and life trustee Dick Couper.
"I hope that King's will listen to its most beloved alumnus and a man revered around the world as a moral voice," said Mark Horowitz, from the Fossil Free KCL campaign.
Cheryl and Michael, Jeni and Peter Joanna and Aaron TARNOPOL--Michael TARNOPOL--Michael of PennsyL.ania mourns The death of beloved alUniversity of Pennsylvania Vice Chairmourns itheBoardeathTrustees and lofgtime membelovedthe BoalumnusOverseers of Penn's Wharton School.
The Yeshiva University family mourns the passing of a highly beloved alumnus of Yeshiva College '60, Isaac Breuer College '61 and Wurzweiler School of Social Work '62 who had consecrated his life to serving the community as a social worker and mentor to hundreds of Jewish communal workers worldwide.
The 46-year-old actor, who was found dead of an apparent drug overdose in his New York City apartment on Sunday (Feb. 2), was a beloved alumnus of the school near Rochester, N.Y. and had a profound impact on those who knew him.
