Gardiner is of Norman origin, derived from the Old French word 'gardine', meaning 'little garden'. It was originally an occupational surname given to a gardener or someone who lived near gardens. The name was brought to England by the Normans after the Norman Conquest in 1066. Over time, Gardiner has evolved into a given name as well, particularly in English-speaking countries.
"Over this span of years, the name Gardiner was consistently popular, with an average of about 6 births per year and a notable peak in 1957 with 10 births."