Background: Following the ongoing globalisation, family businesses have been inclined to grow their businesses outside of their home markets. While academic attention has been devoted to family business internationalisation, it has mainly taken a family-focused perspective. Existing international business theories emphasise foreign market networks as facilitators for internationalisation, leaving home market networks under-researched. Purpose: This paper explores family business internationalisation by adopting an international business lens. The revised Uppsala model is used as the main frame of reference to understand how network relationships in the home market facilitate family business internationalisation. Method: The study is based on a qualitative design with an exploratory purpose and a grounded theory methodology, following a realist ontology and constructionist epistemology. Six in-depth semi-structured interviews with four family businesses were conducted. The use of grounded analysis allowed us to find patterns and explanations to ultimately develop a theory grounded in our findings. Conclusion: The benefits resulting from home market network relationships facilitate family business internationalisation. Predominantly, the acquisition of knowledge is a necessary step to gain resources family businesses are missing to internationalise. The conceptualisation of our theoretical model with the revised Uppsala model suggests an elaboration of the latter to include network resources and capabilities.