The term "male line" typically refers to the ancestral line that runs through the paternal side of a family. Some common synonyms for this term include "father's line," "paternal line," and "masculine line." Additionally, some may refer to this lineage as the "surnames line," as many family names are passed down through the male side of a family. Other potential synonyms for "male line" might include "biological line," "male bloodline," or simply "patrilineage." Regardless of the specific terminology used, the male line of a family is often important in genealogy and ancestry research, providing valuable insight into a family's history and heritage.