In the art world, the artwork caption labels known as tombstones have what are formally known as "life dates." You can also find the term "life dates" applied descriptively in genealogy, biographical, encyclopedic, and other archival contexts.
Here's an excerpt from the Association of Art Editors style guide:
Life dates: Give in full. Examples:
Arminius (c. 17 B.C.–A.D. 21)
385–331 B.C. (All digits are given for all B.C. dates.)
Abbreviations may be used in text for life dates given in parentheses.
born = b. (b. 1930) Note: this is
preferable to the form (1930–)
d. (d. 1538)
about = c. or ca. (ca.
flourished = fl. (fl.
1503–30) (fl. 1530s) (fl. 16th century)
date known but unverified = ? (1489?–d. 1538)
active = act. (or spell out) (act. 16th century or active
Rutgers Art Review's editorial style guide calls them, quite literally, "parenthetical life dates":
As an aid to the reader, please provide parenthetical life dates for
historical figures, as well as publication dates for works discussed
in the main text.