the inscription on the Fredrikstad bracteate (N IK244) reads u=duuz or h=duuzi (unknown meaning)

It's Akkadian, written in phonetic signs for Akkadian sounds and logograms that represent words, but not sounds. e.g. ‘of soldiers who stood in for their fathers’ in Akk. ša rēdî ša ana abīšu itbû; here rēdî, soldiers, is written UKU.UŠ.MEŠ, while the verb itbû is represented phonetically as it-bu-ú

Arish, rb srsrm, chief of brokers (cf סרסור mediator, middleman) inherited his title from his paternal great-great-great-grandfather, and mentions his maternal great-great-grandfather’s title, rb ḥzʿnm, chief of inspectors/prefects, an office similarly attested in Akkadian sources as ḫazannu ’mayor’

mṣbt ʾz ʾš yṭnʾ ʾrš rb srsrm lʾby lprsy
rb srsrm bn ʾrš rb srsrm bn mnḥm rb srsrm
bn mšl rb srsrm bn prsy rb srsrm wlʾmy
lšmzbl bt bʿlrm bn mlkytn bn ʿzr rb ḥz
ʿnm ʿl mškb nḥtnm lʿlm