Lilac (Syringa species) is a member of the Oleaceae (Olive) Family.    From Wordnik.com.  [Brigitte Mars: Lovely Lilacs with Brigitte Mars] Reference

These are made up of Cupressaceae, Anacardiaceae, Pinaceae, Oleaceae, and Fagaceae families.    From Wordnik.com.  [Sulaiman Range alpine meadows] Reference

One correction, Sabah al ful, meaning morning of the Jasminum Sambac Arabic, it called Ful, Oleaceae.    From Wordnik.com.  [Morning of Roses] Reference

The first bloom to announce coming of autumn by the strong fragrance is "kin (= golden) mokusei" (Oleaceae fragrans).    From Wordnik.com.  [News: Digital Photography Review (dpreview.com)] Reference

Ligustrum of the Olive family, Oleaceae.    From Wordnik.com. Reference

Oleaceae.    From Wordnik.com.  [Chapter 7] Reference

Family: Oleaceae.    From Wordnik.com. Reference