There is one box and it has a line going to the right that separates and leads to two separate boxes. Then each of those two boxes have a line that divides in two to two more boxes. So there are a total of seven boxes.
This is a Genealogy icon. We've made it in iOS style
, first introduced in iOS version 7 and supported in all later releases up until now (at least iOS 11). This style is based on thin two-pixel lines and is optimized for 50x50 px. Unlike other vector icon packs that have merely hundreds of icons, this icon pack contains 13,900 icons, all in the same style and quality.