The etymologies of English blood and bone are obscure. Although their cognates are well represented in the Germanic family, both lack clear cognates in other Indo-European languages. Various explanations for their origins have been proposed, including that they may be non-Indo-European (e.g. Hawkins 1987). Blood and bone, and their cognates, share an initial /b/ with numerous body-related words (e.g. beard, breast, bosom) throughout Germanic. This initial /b/ constitutes a phonestheme. Phonesthemes – ‘recurring sound-meaning pairings that are not clearly contrastive morphemes’ (Bergen 2004: 290) – are present in many Germanic languages, but their role in lexicogenesis is little understood. I suggest that blood and bone were formed by blending the initial /b/ phonestheme with two pre-existing lexemes: Proto-Germanic *flōda- ‘something that flows’ and *staina- ‘stone’. Phonesthetic blending may be a fruitful avenue for future etymological research.