Rex V. Naylor, 91, chief of speech pathology from 1966 to 1986 at what was then the National Naval Medical Center in Bethesda, died May 12 at Montgomery Hospice’s Casey House in Rockville. He had Alzheimer’s disease.

The death was confirmed by his wife, author Phyllis Naylor.

Dr. Naylor was supervisor of speech pathology at Walter Reed Army Medical Center in Washington from 1955 to 1966. He published articles on stuttering and was a member of the American Speech-Language-Hearing Association and the American Psychological Association.

Rex Vaughn Naylor was a native of Grafton, W.Va., and a 1942 graduate of West Virginia Wesleyan College. From Ohio State University, he received a master’s degree in 1952 and a doctorate in 1955, both in speech pathology.

During World War II, he served in the Army in the Pacific and was a regimental radio operator and communications chief.

Dr. Naylor, a Gaithersburg resident, was a member of Cedar Lane Unitarian Universalist Church in Bethesda. He was a member of peace organizations and did volunteer work for what is now Population Connection, a nonprofit group that advocates family planning.

He participated in chess clubs and leagues, and he won individual and team trophies.

His first marriage, to Ida Bell, ended in divorce. A daughter from that marriage, Nan Lee Naylor, died in 2011.

Survivors include his wife of 52 years, Phyllis Reynolds Naylor of Gaithersburg; two sons from his second marriage, Jeffrey Naylor of Minneapolis and Michael Naylor of Raritan, N.J.; and four grandchildren.

— Adam Bernstein