I need to get the Manager name using sharepoint designer 2013 workflow. Can anyone please help me to achieve this.
In SharePoint 2013 workflow type we do not have Lookup Manager for User activity. For that SharePoint 2013 workflow you will need to use the Call HTTP Web Service activity, with the following end point URL:
You can get more information at Details
You can use SharePoint 2010 workflow in SharePoint 2013. Then use lookup Userprofiles activity to get manager name.