Combination of Mary (bitter/beloved) and Lee (meadow).
Marilee is a quintessentially American invention — a compound of Mary and Lee that blossomed in the mid-twentieth century when parents delighted in creating musical, hyphenated-feeling names by fusing familiar components into something that felt new. Mary, of course, descends from the Hebrew *Miriam*, a name whose etymology is debated but often linked to the concepts of beloved, sea of bitterness, or wished-for child; Lee carries Old English roots meaning *meadow* or *clearing*. Together they make a name that sounds like American sunlight — cheerful, open, unhurried.
The name rode the wave of similar mid-century coinages — Bobbie Sue, Betty Jo, Carolee — that reflected a distinctly American fondness for combining the familiar into something fresh. It peaked in popularity during the 1940s and 1950s, the era of Rosemary Clooney and Doris Day, when names with a melodic, two-syllable lilt felt both modern and wholesome. Marilee appeared in regional novels, radio dramas, and the kinds of small-town American stories that Norman Rockwell might have illustrated.
Though Marilee stepped back from naming charts as the century turned toward more international and surname-style names, it has aged into a kind of vintage sweetness that contemporary parents are rediscovering. It belongs to the same renewed-interest category as Loretta, Laverne, and Marlene — names that spent decades seeming dated before the patina of time transformed them into something warm and retro-charming. Marilee carries no cultural baggage, only friendliness.