Objectives. We investigated intra-familial sleep evolution by identifying children’s sleep multi-trajectory groups (SMTGs) between 3- and 60-months of age and their association with parental SMTGs. Methods. We included 180 children from the SEPAGES cohort (Grenoble, France) whose parents belonged to previously identified SMTGs, through group-based multi-trajectory modelling (GBMTM), between 3 and 36 months postpartum, using nighttime (NSD) and weekend daytime (DSD) sleep durations and subjective sleep loss (SSL), comprising “No”, “Subjective” and “Global” sleep problems groups. Child sleep information (NSD, DSD, SSL, night waking (NW) and sleep onset difficulties (SOD)) was collected by parental questionnaires at 3-, 12-, 36- and 60-months. We identified SMTGs using GBMTM in children and examined their associations with parental SMTGs using multinomial logistic regressions. Results. We identified three SMTGs in children: the “No/few” group (29.4%) had moderate NSD, long DSD, low SSL/NW/SOD prevalence, the “Moderate” group (60.0%) had long NSD and moderate DSD, and medium SSL/NW/SOD prevalence, and the “Global” group (10.6%) had the shortest NSD and DSD, and the highest SSL/NW/SOD prevalence. After adjusting for covariates, mothers in the “Global” group were more likely to have children in the same group, and mothers in “Subjective” and “Global” groups were less likely to have children in the “Moderate” group than in the “No/few” group. No association was identified with paternal or couple SMTGs. Conclusions. The observed associations between parent-child SMTGs suggest greater maternal sensitivity to or involvement in the child’s sleep than the fathers. Early preventive sleep actions could improve sleep in children and mothers.