I1
I1 stands for:
- Haplogroup I1 , in human genetics a haplogroup of the Y chromosome
I-1 stands for:
- I-1 (submarine) , Japanese submarine (1924)
- Grigorovich I-1 , Soviet fighter plane (1921)
- Polikarpov I-1 , Soviet fighter plane
I1 stands for:
I-1 stands for: