Group A runes were most common in Viking Age Denmark
Old Norse Frosthildr (f.)
The postulated name Frosthildr may be an Anglo-Scandinavian formation as it is only attested in the minor place-name of Throstle Hill, West Yorkshire. It is an Old Norse compound formed from Frost- ‘frost’ and -hildr ‘battle’.
Carole Hough, ‘Women in English place-names’, in ‘Lastworda Betst’. Essays in memory of Christine E. Fell with her unpublished writings, ed. Carole Hough and Kathryn A. Lowe. Donington: Shaun Tyas (2002), pp. 41-106.
Gillian Fellows Jensen, Scandinavian Personal Names in Lincolnshire and Yorkshire. Copenhagen: Akademisk Forlag (1968), pp. 87, 343, 349.