| Cultivar | Plant Size | Leaf Color | Variegation | Var Color | Origin | Flower Color | Season | Source | Registered |
| 'Bristol Frances Williams' | Large | Med-Green | Marginal | Yellow | Hybrid | Near-White | June into July | Summers, Alex | --NR-- |
| 'Chicago Frances Williams' | - | - | - | - | Duplicate | - | - | Duplicate Name | --NR-- |
| 'Exotic Frances Williams' | Large | Blue/Green | Marginal | White | TC Sport | Near-White | July | Klehm, Roy | --NR-- |
| 'Frances Williams' | Large | Blue/Green | Marginal | Yellow | Nat-Sport | Pale-Lavender | July into August | Williams, Frances & Williams, Connie | .1986 |
| 'Frances Williams Baby' | Large | Blue/Green | - | - | Hybrid | Near-White | June | Minks, Eldren | .1980 |
| 'Frances Williams Improved' | Large | Blue/Green | Marginal | Yellow | Nat-Sport | Near-White | June into July | Unknown | --NR-- |
| 'Frances Williams Selections' | - | - | - | - | Unknown | - | - | Soules, Marge | --NR-- |
| 'Frances Williams Special' | Large | Blue/Green | Marginal | Yellow | Nat-Sport | Near-White | June into July | Schmid, Tom | --NR-- |
| 'Frances Williams Sport' | - | - | - | - | Duplicate | - | - | Duplicate Name | --NR-- |
| 'Frances Williams Squash Edge' | Large | Blue/Green | Marginal | Yellow | Nat-Sport | Near-White | June into July | Williams, Frances & Williams, Connie | --NR-- |
| 'McWilliams #2' | Large | Blue/Green | Streaked | Yellow | Unknown | - | - | Unknown | --NR-- |
| 'Robb McWilliams' | Large | Dark-Green | Marginal | White | Unknown | - | - | McWilliams, Robb & Cindy | --NR-- |
| 'Sweet William' | Large | Dark-Green | Streaked | White | Hybrid | Med-Lavender | July | Asch, Stuart | .2004 |
| 'William Bedard' | Small | Dark-Green | Marginal | Yellow | Hybrid | Deep-Purple | August | Crabb, Scott | .2004 |
| 'William Henry Harrison' | Large | Light-Green | - | - | Unknown | - | - | Ruh, Peter & Jean | .2010 |
| 'William Lachman' | Large | Med-Green | Streaked | White | Hybrid | Med-Lavender | July | Vaughn, Kevin | .1981 |
| 'William's Edge' | - | - | - | - | Duplicate | - | - | Duplicate Name | --NR-- |
| 'Wylde William' | Large | Yellow | Marginal | Green | Nat-Sport | Pale-Lavender | July | Stratton, John & Elizabeth | --NR-- |
| 'Zager's Frances Williams' | - | - | - | - | Duplicate | - | - | Duplicate Name | --NR-- |
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