This study provides evidence for relatively early marriage among Ashkenazi Jews compared to Sephardi Jews and Christians in seventeenth-century Western Europe. The results of this study suggest that these differences are not just structural. For example, Ashkenazi parents seem to have been more willing to support married sons during their lifetimes than have Sephardi parents. One form of assistance was coresidence, which was relatively common among wealthier Ashkenazi families. The study is based on data from Amsterdam that probably are the earliest available data on nuptiality for any Jewish community.