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Gillian Fierer O'Nan

About me

Gillian O’Nan is an Atlanta family law attorney experienced in all aspects of family law, having dedicated her entire career to practicing family law. Gillian provides effective, resourceful, and responsive representation in a wide range of family law matters including divorce actions, separate maintenance actions, alimony and spousal support actions, child custody and support actions, contempt actions, post-divorce modification and enforcement, adoptions, family violence actions, legitimation actions, prenuptial and postnuptial agreements, and wills.


Gillian understands that the emotional and financial consequences of family law litigation can be devastating for parties and children. Therefore, Gillian takes pride in her ability to resolve even the most complex disputes in a civil manner while protecting her clients’ parental rights, property interests and the best interests of the child. Gillian also realizes that despite highly skilled negotiations some cases must go to trial. In those cases, Gillian has the experience and training to tenaciously pursue her clients’ best interests in the courtroom.


In adherence to her core values, Gillian believes that she can only obtain excellent results with ethical practice. She treats her clients with respect and compassion. Gillian will strive to find a resolution to your case that will protect your children, maximize your financial security and promote a positive future for you and your family. As a sole practitioner, Gillian will provide individualized attention to your case, responding to you directly and quickly, and providing you with thorough and individualized attention. Gillian will listen to you, provide you with options, and keep you informed every step of the way. No matter how simple or complex your case is, her goal is to maximize outcomes and minimize costs while providing you with comfort and guidance during this most difficult time in your life. As a mother of three, Gillian is extremely child-focused, and will work diligently to protect the interests of your children, minimizing the amount of trauma that they experience during this process.


When you are ready, please give Gillian a call to arrange a confidential consultation. Gillian is happy to assist you with any divorce or family law related matter in the Atlanta area, as well as any family law matter in the surrounding counties.


Practice areas


  1. Family: 30%
  2. Divorce: 30%
  3. Child Custody: 30%
  4. Child Support: 5%
  5. Alimony: 5%



Retainer (always)

Payment types:

Cash, Check, Credit card

Attorney endorsements

11 total 

Are you an attorney? Endorse this lawyer

  • Blake Dexter Halberg

    I endorse this lawyer.


    Blake Halberg Child custody Attorney
    Relationship: Fellow lawyer in community

  • Justin Spizman

    Gillian is a smart and hard-working attorney that cares deeply for her clients. Without hesitation, I would recommend any of my clients to her. She is experienced, well-trained, and simply one of the best.


    Justin Spizman DUI and DWI Attorney
    Relationship: Fellow lawyer in community

Contact info

Elovitz/O'Nan, LLC

38 Old Ivy Road, NE
Suite 150
Atlanta, GA, 30342


GAActive Member in Good Standing 200607/15/2016
We have not found any instances of professional misconduct for this lawyer.
Avvo contributions
Legal answers
Award nameGrantorDate granted
"Attorneys to Watch in 2014", Honorable MentionAttorney at Law Magazine, Atlanta Edition2014
Rising StarGeorgia Super Lawyers2014
Top 10 Attorneys Under 40National Academy Of Family Law Attorneys2014
AV Peer Review RatingMartindale-Hubbell2014
Preeminent 5.0 out of 5Martindale-Hubbell2014
Legal EliteGeorgia Trend Magazine2014
"Best Attorney" Award, Mock TrialKilpatrick Stockton2003
Work experience
TitleCompany nameDuration
Founding PartnerElovitz/O'Nan, LLC2014 - Present
Founding PartnerGillian Fierer O'Nan, P.C.2013 - Present
AssociateLevine, Smith, Snider & Wilson2008 - 2012
AssociateWeinstock & Scavo, PC2006 - 2008
Association namePosition nameDuration
Civil MediatorCivil Mediator2014 - Present
Cobb County Superior CourtGuardian ad Litem2014 - Present
Lawyers Club of AtlantaMember2013 - Present
State Bar of Georgia, Transition into Law Practice ProgramMentor2013 - Present
American Bar Association, Family Law SectionMember2010 - Present
State Bar of Georgia, Family Law SectionMember2008 - Present
Atlanta Volunteer Lawyers FoundationGuardian ad Litem2008 - Present
Atlanta Bar Association, Family Law SectionMember2007 - Present
State Bar of Georgia, Young Lawyers DIvision, Family Law CommitteePresident2010 - 2011
State Bar of Georgia, Family Law SectionExecutive Committee Member2010 - 2011
State Bar of Georgia, Young Lawyers DIvision, Family Law CommitteeEvent Chair, Supreme Cork2008 - 2010
Legal cases
Case nameOutcome
Custody actionSuccessful
See all legal cases 
Publication nameTitleDate
The Family Lawyer, Atlanta Bar AssociationThree Practical Tips for The Family Lawyer- From a Young Lawyer's Perspective2011
School nameMajorDegreeGraduated
University of Georgia School of LawLawJD - Juris Doctor2006
University of Georgia School of LawPolitical ScienceBA - Bachelor of Arts2002
Speaking engagements
Conference nameTitleDate
Tropical CLEHardman v. Hardman- Res Judicata in Divorce Cases2015