Modern blend of the prefix Ar- with Lynn (lake), a mid-20th century American coinage.
Arlynn is a modern blended name, most likely combining Arline or Arlene with the suffix Lynn — a construction that follows a productive 20th-century American pattern of joining an established given name with a mellifluous second element. Arlene itself has somewhat debated origins: it may derive from the Irish Árlaith (high sovereignty), from a feminine elaboration of the Germanic Carl or Charles (meaning free man), or from the Gaelic airleas. What is clear is that Arlene became popular in the English-speaking world through the early and mid-20th century, carried forward by figures like Arlene Francis, the long-running television personality on What's My Line, who embodied a particular mid-century American sophistication.
Lynn, meanwhile, brings a distinct Welsh inheritance: from the Welsh llyn, meaning lake or pool, it evokes still water, reflection, and the quietly luminous landscapes of the Celtic west. As a suffix it was enormously productive in American name construction from the 1940s through the 1970s — Marilyn, Carolyn, Jacquelyn, Gwendolyn all follow variants of this pattern, suggesting that the soft nasal ending carried a sense of lyrical femininity that resonated strongly with mid-century naming sensibilities. Arlynn thus sits at a specifically American mid-century cultural moment, a name that feels handcrafted rather than borrowed — assembled by parents who wanted something that honored familiar sounds while creating something uniquely their own.
Names like Arlynn carry sociological as well as etymological interest: they document the democratic creativity of American naming culture, the belief that parents need not choose from a fixed canon but can combine, extend, and invent. Today Arlynn is genuinely rare, which gives it the double appeal of sounding warmly familiar while belonging, in this precise form, to almost no one else.