The phrase "an often distinguished" is correct and usable in written English.
It can be used to describe someone or something that is frequently recognized for excellence or notable achievements.
Example: "She is an often distinguished scholar in the field of environmental science, known for her groundbreaking research."
Alternatives: "a frequently recognized" or "a commonly esteemed".
Critics often distinguished (with an often oblivious rigidity) between movies of artistic merit and purely commercial productions.
Simkin has not often distinguished himself as a partner of ballerinas.
His portraiture is lively and expressive and is often distinguished by elegant composition and a rich chiaroscuro.
For instance, several DNA copy number aberration types, e.g., loss and gain, are often distinguished, and they may have a different effect on the transcriptomic heterogeneity.
Process safety and personal safety are often distinguished in literature and practice despite an acknowledged advantage in their integration.
This position stands in contrast to philosophical traditions, be they Indian or Western, in which feelings and emotions are often distinguished from cognitions because they lack an object.
It is this newly discovered and powerful commitment to a Europe free of the ethnic hatred and prejudice that often distinguished the Continent in the past that appears to lie behind the vehement stand against Mr Haider.
Some of his songs feature a basic clawhammer style of right-hand playing but these are often distinguished by unusual chord voicings or by chords with added notes.
(9) Genes with trans-splices are often distinguished from those that are not by the presence of an outron.
Temnospondyl larvae are often distinguished by poorly developed bones and the presence of a hyobranchial apparatus, a series of bones that gills would attach to in life.
One way nightmares are often distinguished from dreams is in whether the dream causes a person to wake -- whether out of fear, or to put an end to the dream.
