Etymology

Always derived from ON, cp. the OIcel combining form odda- and oddi (n.) 'triangle, point (of land); (metaphorically) odd number'. From the same PGmc base *uzd- as the st. n. *uzdaz 'sharp point', cp. OIcel oddr, OE, OFris, OS ord, OHG ort.

PGmc Ancestor

*uzd-

Proposed ON Etymon (OIcel representative)

odda-, oddi (n.) 'triangle, point (of land); (metaphorically) odd number'
(ONP oddi (sb.))

Other Scandinavian Reflexes

Far oddi, Icel oddi, Norw odde, Dan dial odde, Sw udda

OE Cognate

cp. OE ord 'point'

Phonological and morphological markers

ON consonant cluster assimilation

Summary category

A1*

Attestation

Common and widespread from the late 13c.

Occurrences in the Gersum Corpus

Cl 426, 505; WA 27, 94, 189 etc. 

At WA 3783 the construction ~ men 'illustrious soldiers' is generally printed as one word.

Bibliography

MED odde (adj.) , OED3 odd (adj., n.1. and adv.) , HTOED , Bj. 169, de Vries oddi, Mag. oddi, Orel *uzđaz, Kroonen *uzda