Grier

From a surname which was a variant of GREER.

GREER   female & male   Scottish, English (Rare)
From a Scottish surname which was derived from the given name GREGOR.
GREGOR   male   German, Scottish, Slovak, Slovene
German, Scottish, Slovak and Slovene form of GREGORY. A famous bearer was Gregor Mendel (1822-1884), a Czech monk and scientist who did experiments in genetics.
GREGORY   male   English
English form of Latin Gregorius, which was from the Late Greek name Γρηγοριος (Gregorios), derived from γρηγορος (gregoros) meaning "watchful, alert". This name was popular among early Christians, being borne by a number of important saints including Saint Gregory Thaumaturgus (3rd century), Saint Gregory the Illuminator (4th century), Saint Gregory of Nyssa (4th century), Saint Gregory of Nazianzus (4th century), and Saint Gregory of Tours (6th century). It was also borne by the 6th-century pope Saint Gregory I the Great, a reformer and Doctor of the Church, as well as 15 subsequent popes.

Due to the renown of the saints by this name, Gregory (in various spellings) has remained common in the Christian world through the Middle Ages and to the present day. It has been used in England since the 12th century. A famous bearer from the modern era was American actor Gregory Peck (1916-2003).
EQUIVALENTS
ENGLISH: Grier
SCOTTISH: Grier
OTHER FORMS
ARMENIAN: Grigor, Krikor
BULGARIAN: Grigor
CROATIAN: Grga, Grgur
CZECH: Řehoř
DANISH: Gregers
ENGLISH: Greer, Greg, Gregg, Gregory
FINNISH: Reijo, Reko
FRENCH: Grégoire
GEORGIAN: Grigol
GERMAN: Gregor
GREEK: Gregorios
HUNGARIAN: Gergely, Gergő
IRISH: Gréagóir
ITALIAN: Gregorio
LATE GREEK: Gregorios, Gregorius
LATVIAN: Grigorijs
MACEDONIAN: Gligor, Grigor
MEDIEVAL SLAVIC: Grigorii
NORWEGIAN: Gregers
POLISH: Grzegorz
ROMANIAN: Grigore
RUSSIAN: Grigori, Grigoriy, Grigory, Grisha
SCOTTISH: Greer, Gregor, Greig, Griogair
SLOVAK: Gregor
SLOVENE: Grega, Gregor
SPANISH: Goyo, Gregorio
SWEDISH: Greger
UKRAINIAN: Hryhoriy
VARIOUS: Goretti
WELSH: Grigor