The source article[1] suggests that (in my own words) it may have to do with several kins that were brought together and tried to seal their bond by assembling

The source article[1] suggests that (in my own words) it may have to do with several kins that were brought together and tried to seal their bond by assembling a fictive individual from several deceased relatives. Or that an original important burial site was disturbed and they tried to restore the body. [1] https://www.cambridge.org/core/journals/antiquity/article/assembling-ancestors-the-manipulation-of-neolithic-and-galloroman-skeletal-remains-at-pommeroeul-belgium/A25B2FBB53A9DE7665F30AD14F06A22A# https://www.cambridge.org/core/journals/antiquity/article/as...