Question: When did the process occur that occurred after the futhorc runes are thought to have been developed, resulting in the Anglo-Saxon runes to also being called the Anglo-Frisian runes?

<P0-S0> PoxNora: Battlefield of the Immortals is a multiplayer online game that combines a collectible card game with a turn-based strategy game in a fantasy setting. <P0-S1>  "PoxNora" was originally launched via Java Web Start through a browser and can be played on Microsoft Windows, Mac OS X, and Linux. <P0-S2>  The game is free to play with "Sample Battlegroups", and players can purchase additional game pieces, called "runes", and build their own strategies. <P0-S3>  The game currently includes more than 1600 runes. <P0-S4>  The game was originally designed and developed by Octopi Media Design Lab, which as of January 16, 2009 became owned by and operated by Sony Online Entertainment. <P0-S5>  This division of SOE was formerly referred to as SOETucson (because Octopi's headquarters was located in Tucson, Arizona). <P0-S6>  On April 1, 2011, SOE closed down the Tucson studio along with its Seattle and Denver studios, laying off over 200 employees in the process. <P0-S7>  Some members of the "PoxNora" team were moved to the San Diego HQ to continue development. <SEP> <P1-S0> The Anglo-Saxon settlement of Britain describes the process which changed the language and culture of most of what became England from Romano-British to Germanic. <P1-S1>  The Germanic-speakers in Britain, themselves of diverse origins, eventually developed a common cultural identity as Anglo-Saxons. <P1-S2>  This process occurred from the mid-fifth to early seventh centuries, following the end of Roman power in Britain around the year 410. <P1-S3>  The settlement was followed by the establishment of Anglo-Saxon kingdoms in the south and east of Britain, later followed by the rest of modern England. <SEP> <P2-S0> Anglo-Saxon runes are runes used by the early Anglo-Saxons as an alphabet in their writing. <P2-S1>  The characters are known collectively as the futhorc (or "fuþorc"), from the Old English sound values of the first six runes. <P2-S2>  The futhorc was a development from the 24-character Elder Futhark. <P2-S3>  Since the futhorc runes are thought to have first been used in Frisia before the Anglo-Saxon settlement of Britain, they have also been called Anglo-Frisian runes. <P2-S4>  They were likely used from the 5th century onward, recording Old English and Old Frisian. <SEP> <P3-S0> The Caistor-by-Norwich astralagus is a roe deer astragalus found in an urn at Caistor St. Edmund, Norfolk, England. <P3-S1>  The astragalus is inscribed with a 5th-century Elder Futhark inscription, reading raïhan "roe". <P3-S2>  The inscription is the earliest found in England, and predates the evolution of the specifically Anglo-Frisian Futhorc. <P3-S3>  As the urn was found in a cemetery that indicated some Scandinavian influence, it has been suggested that the astragalus may be an import, perhaps brought from Denmark in the earliest phase of the Anglo-Saxon settlement of Britain. <P3-S4>  The inscription is an important testimony for the Eihwaz rune and the treatment of Proto-Germanic "*ai". <P3-S5>  The "h" rune has the Nordic single-bar shape , not the Continental double-bar which was later adopted in the Anglo-Frisian runes.