Staffrow, also spelled stæfrow, is a willsome word coming from OE stæfræw which refers to a particular language's alphabet (i.e. Georigish staffrow for "Georgian alphabet"). Staff by itself means a letter, so staffrow quite literally means "letter-row".
The Willsome English Staffrow is unique in that it acts as a complete alphabet but categorizes letters based on their voluntary status in the language. It includes every letter historically used in English, with the exception of the Yogh (due to the fact the Insular G replaces it). There are three different sets (written in mainstream spelling): Mainstaves, Chisestaves, and Sidestaves. In the WSE Ewbook, the page (leaf) with the Staffrow also includes the signs (marks) used in WSE such as the And and Longmark (Macron) although these aren't technically part of it.
1. A name like "Ge" when it would normally be "Ye" indicates Norse influence, so the hard g variant is
2. The attested name Aitch for this staff and, by comparison, the ME name Hake are due to Old French influence. To circumvent this, He is a new name coined in the WSE Ewbook by analogy with Ye, Chee, Dee asf.
Unlike Anglish or MSE, spelling in WSE is not standardized for a reason. As we see the rise of ganghood, the standardization of spelling rises with it. However, there is such thing as spellings that are willsome and spellings that aren't (in fact, this inspired the Mainstaves, Chisestaves and Sidestaves separation). A lot of these are covered Sticky 1 of the WSE Ewbook. Instead of having an exact way to spell each word, a writer can spell however they want (often according to personal preferences and innovations to suit their dialect). This is similar to Old and Early Middle English before spelling standards were established.
The Etymonline entry.
The WSE wordbook, mentioned here several times, can be found here.