Seventh House (7H) in Vedic Astrology - Bhava VII

7H in kalapurush kundli is represented by the sign Libra (Tula)

karka for 7H - Venus
Other Names for 7H - kalatra BHava, Yuvati House, Jaya Bhava, Vaanijya Bhava, Jamitra Bhava and Maraka Sthana(being 12th to eighth)

 Also called Asta Bhavana (any house 7^th from a planet is asta bhavna for that planet).
7th Bhava is  the bhava of associations,  the bhava of unity & togetherness and self-reflection; harmony, complementation and opposition.