This review aimed to synthesize qualitative evidence of views and experiences of partners and other family members who provided breastfeeding support for a relative. The Joanna Briggs Institute (JBI) methodology for systematic reviews of qualitative evidence was followed. Seven databases: CINAHL, MEDLINE, EMBASE, PsycINFO, Scopus, Maternal and Infant Care, and Web of Science were searched. Partners and other family members (e.g. grandmothers, siblings) of women in any countries were included. Included papers were critically appraised. The JBI meta-aggregative approach was used to analyze data and form synthesized findings. Seventy-six papers from 74 studies were included. Five synthesized findings were: (i) spectrum of family members' breastfeeding knowledge, experiences and roles; (ii) the complexity of infant feeding decision making; (iii) the controversy of breastfeeding in front of others; (iv) impact of breastfeeding on family; and (v) it takes more than just family members: support for family members. Partners' and family members' views and experiences of breastfeeding support reflected multi-faceted personal, social, financial, cultural, religious, emotional, psychological, and societal factors of the support they provided (or not). Healthcare professionals should engage them in breastfeeding discussions with the woman, and offer tailored and practical guidance relevant to help them to appropriately support the woman. This article is part of the theme issue 'Multidisciplinary perspectives on social support and maternal-child health'.
Keywords: breastfeeding; family; qualitative systematic review; social support.