Thanks for the reply. Yes, I am aware of that the oath ceremony will be conducted at Alexandria Court (D.C. area) in front of the judge for the name change applicants. What I am looking for is the timeline it took for similar cases in the D.C. area.
I had my citizenship (with a name change request on the form) interview in Mid May'17 in Fairfax field office (D.C. area) and got the approval letter. FO said that I should have my oath ceremony within 4 weeks. My online status still shows 'Oath Ceremony will be Scheduled' since the second week of June'17 and no updates after that. Not sure how much longer the wait will be. Is anyone else who has a name change request can let me know how long they have to wait for Oath Ceremony (most likely in Alexandria court) after attending the Citizenship interview at Fairfax field office. Thanks.