The seven original defendants arrested in November and five more added last month entered the pleas in a federal courtroom.
U.S. District Judge Dan Aaron Polster refused a defense appeal to release on bond the suspected ringleader, Samuel Mullet Sr., 66, and his son, Johnny Mullet, 37, both of Bergholz, near Steubenville in eastern Ohio.
A feud over church discipline allegedly led to five attacks in which the beards and hair of men and hair of women were cut, which is considered deeply offensive in Amish culture.
The seven-count indictment includes charges of conspiracy, assault and evidence tampering in what prosecutors say were hate crimes motivated by religious differences.
The indictment also charges three other children of Mullet, a son-in-law, three nephews, the spouses of a niece and nephew and a member of the Mullet community in Bergholz.
Mullet told The Associated Press in October that he didn't order the hair-cutting but didn't stop his sons and others from carrying it out. He said the goal was to send a message to other Amish that they should be ashamed of themselves for the way they were treating Mullet and his community.
The original defendants were Mullet's sons Daniel and Lester Mullet; son-in-law Emanuel Schrock; nephew Eli Miller; and community member Levi Miller.
Newly charged were Mullet's daughter Linda Schrock; nephews Lester and Raymond Miller; Anna Miller, the wife of another nephew; and a niece's husband, Freeman Burkholder.
Complete coverage of Amish beard-cutting attacks on crimesider
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Photo: Sam Mullet stands in front of his Bergholz, Ohio home on Monday. Oct. 10, 2011.
(Credit: AP Photo/Amy Sancetta)
