Dillan

Dillan as a feminine name represents a gender-crossing trend where traditionally male names are adopted for girls, often with modified spellings. Originally an Irish surname derived from 'Diolún,' meaning 'faithful' or 'loyal,' Dillan is more commonly used for boys (usually spelled Dylan). The feminine usage gained modest traction in the 1990s and 2000s as gender boundaries in naming became more fluid. Parents choosing Dillan for a daughter might appreciate its strong sound combined with its lesser use for girls, creating a distinctive identity. The name carries connotations of faithfulness and determination while maintaining a contemporary feel. Though uncommon for girls, it fits alongside other surname-style names that have crossed gender lines.

Pronounced DIL-un.

As of October 2026, Dillan ranked #10312 in US births in 2025 SSA, peaked at #4337 in 2003.