This is a variation of a tiling found in Stuart Durant's Ornament,
From the Industrial Revolution to Today, The Overlook Press,
Woodstock NY, 1986. The original is in Arabische und alt-Italienische
bau-Verzierungen, by F.M. Hessemer,
published in Berlin in 1842.
Patterns with symmetry type p4g Egyptian Patterns from The Grammar of Ornament North African Tilings