[1] The precise counties that Raganar ruled are uncertain but are known to have been south of Thérouanne.
In the Capitulary of Servais, part of District (Missaticum) 4 is identified as "the counties of Reginar".
This district, with Thérouanne as its capital and bishopric, stretched south for about 100 km.
Because of the locality of District 4 and the uncertainty of rule in the 9th century, it is likely that these counties included part of Hesbaye.
[2] Raganar participated in Charles' 876 campaign against his nephew Louis the Younger.