The Fairfax Bar Association has nominated seven Northern Virginia lawyers as candidates for two soon-to-be vacant judgeships in the county's circuit and juvenile and domestic relations courts.

The association nominated three local attorneys to be considered for the Circuit Court seat of Lewis D. Morris, who retires Jan. 1. The candidates are J. Howe Brown, 44, a Democratic Party worker with the firm of Boothe, Pritchard and Dudley; John Sabourin Jr., 37, who is with the firm of Hazel, Buckhorn and Hanes, and Jack B. Stevens, 49, who is with the firm of Stevens, Cake, Rhoades, and Rideout and ran unsuccessfully for the board of supervisors in 1967.

The vacancy on the juvenile court bench will open when Judge Frank Deierhoi retires in April. The bar's four nominees for that job are: Jane Becker-Smith, 37, a member of the firm of Taylor and Becker-Smith; John Karcha, 55, a member of the firm of Wood and Karcha; Paul W. Hammack Jr., 43, a member of the law firm of Gabeler and Gastley, and R. Dean Kidwell, 36, an assistant Fairfax Commonwealth's Attorney.

The Northern Virginia legislative delegation will select a candidate for the two seats and present their recommendations to the General Assembly, which is expected to elect the judges in late January.

Although the legislators are not bound by recommendations of the bar, the delegation usually selects its candidates from that list, said State Sen. Adelard L. Brault (D-Fairfax).