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[email protected] or consult our website: www.benjamins.com Tables of Contents, abstracts and guidelines are available at www.benjamins.com Plural inflection in North Sea Germanic languages A multivariate analysis of morphological variation Arjen P. Versloot and Elżbieta Adamczyk University of Amsterdam & Fryske Akademy / University of Wuppertal & Adam Mickiewicz University, Poznań The present study explores the variation in the plural inflection of eight varieties of Frisian and English, focusing on irregular plural formations. The aim of the study is to identify and assess the significance of the factors which contributed to the preservation and emergence of irregular plural patterns in the investigated varieties. Multivariate regression analysis, which was employed to weigh the significance of individual factors, reveals that the retention and emergence of ir- regular plural patterns is primarily determined by a combination of three major factors: relative frequency, absolute frequency and salience.