By surface analysis, gut + -en- + Stein.
Gutenstein n (proper noun, genitive Gutensteins or (optionally with an article) Gutenstein)
Gutenstein m or f (proper noun, surname, masculine genitive Gutensteins or (with an article) Gutenstein, feminine genitive Gutenstein, plural Gutensteins)
singular | plural | |||||||
---|---|---|---|---|---|---|---|---|
masculine | feminine | |||||||
indef. | def. | noun | indef. | def. | noun | def. | noun | |
nominative | (ein) | (der) | Gutenstein | (eine) | (die) | Gutenstein | (die) | Gutensteins |
genitive | (eines) | (des) | Gutensteins, Gutenstein1 | (einer) | (der) | Gutenstein | (der) | Gutensteins |
dative | (einem) | (dem) | Gutenstein | (einer) | (der) | Gutenstein | (den) | Gutensteins |
accusative | (einen) | (den) | Gutenstein | (eine) | (die) | Gutenstein | (die) | Gutensteins |
1With an article.