A cross with two crossbars, one above and one below the midpoint of the vertical, the lower longer than the upper WordNet 3.0 & Open English WordNet

The Cross of Lorraine, known as the Cross of Anjou in the 16th century, is a heraldic two-barred cross, consisting of a vertical line crossed by two shorter horizontal bars. Wikipedia

A cross consisting of a vertical bar intersected by a shorter horizontal one above its midpoint, and again by another horizontal bar half the length of the first, intersecting the vertical bar midway between the larger horizontal bar and the top of the vertical bar: ☨. It is an emblem of Lorraine in eastern France. Wiktionary